* elflink.c (is_reloc_section): New function. Returns true if the
[deliverable/binutils-gdb.git] / bfd / elf32-cris.c
1 /* CRIS-specific support for 32-bit ELF.
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
3 Free Software Foundation, Inc.
4 Contributed by Axis Communications AB.
5 Written by Hans-Peter Nilsson, based on elf32-fr30.c
6 PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
23 MA 02110-1301, USA. */
24
25 #include "sysdep.h"
26 #include "bfd.h"
27 #include "libbfd.h"
28 #include "elf-bfd.h"
29 #include "elf/cris.h"
30 #include <limits.h>
31
32 /* Forward declarations. */
33 static reloc_howto_type * cris_reloc_type_lookup
34 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
35
36 static void cris_info_to_howto_rela
37 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
38
39 static bfd_reloc_status_type cris_elf_pcrel_reloc
40 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
41
42 static bfd_boolean cris_elf_grok_prstatus
43 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
44
45 static bfd_boolean cris_elf_grok_psinfo
46 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
47
48 static bfd_boolean cris_elf_relocate_section
49 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
50 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
51
52 static bfd_reloc_status_type cris_final_link_relocate
53 PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
54 Elf_Internal_Rela *, bfd_vma));
55
56 static bfd_boolean cris_elf_object_p PARAMS ((bfd *));
57
58 static void cris_elf_final_write_processing PARAMS ((bfd *, bfd_boolean));
59
60 static bfd_boolean cris_elf_set_mach_from_flags
61 PARAMS ((bfd *, unsigned long int));
62
63 static bfd_boolean cris_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
64
65 static bfd_boolean cris_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
66 static bfd_boolean cris_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
67
68 struct elf_cris_link_hash_entry;
69 static bfd_boolean elf_cris_discard_excess_dso_dynamics
70 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
71 static bfd_boolean elf_cris_discard_excess_program_dynamics
72 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
73 static bfd_boolean elf_cris_adjust_gotplt_to_got
74 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
75 static bfd_boolean elf_cris_try_fold_plt_to_got
76 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
77 static struct bfd_hash_entry *elf_cris_link_hash_newfunc
78 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
79 static struct bfd_link_hash_table *elf_cris_link_hash_table_create
80 PARAMS ((bfd *));
81 static bfd_boolean elf_cris_adjust_dynamic_symbol
82 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
83 static bfd_boolean cris_elf_check_relocs
84 PARAMS ((bfd *, struct bfd_link_info *, asection *,
85 const Elf_Internal_Rela *));
86
87 static bfd_boolean elf_cris_size_dynamic_sections
88 PARAMS ((bfd *, struct bfd_link_info *));
89 static bfd_boolean elf_cris_finish_dynamic_symbol
90 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
91 Elf_Internal_Sym *));
92 static bfd_boolean elf_cris_finish_dynamic_sections
93 PARAMS ((bfd *, struct bfd_link_info *));
94 static void elf_cris_hide_symbol
95 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
96 static enum elf_reloc_type_class elf_cris_reloc_type_class
97 PARAMS ((const Elf_Internal_Rela *));
98
99 static reloc_howto_type cris_elf_howto_table [] =
100 {
101 /* This reloc does nothing. */
102 HOWTO (R_CRIS_NONE, /* type */
103 0, /* rightshift */
104 2, /* size (0 = byte, 1 = short, 2 = long) */
105 32, /* bitsize */
106 FALSE, /* pc_relative */
107 0, /* bitpos */
108 complain_overflow_bitfield, /* complain_on_overflow */
109 bfd_elf_generic_reloc, /* special_function */
110 "R_CRIS_NONE", /* name */
111 FALSE, /* partial_inplace */
112 0, /* src_mask */
113 0, /* dst_mask */
114 FALSE), /* pcrel_offset */
115
116 /* An 8 bit absolute relocation. */
117 HOWTO (R_CRIS_8, /* type */
118 0, /* rightshift */
119 0, /* size (0 = byte, 1 = short, 2 = long) */
120 8, /* bitsize */
121 FALSE, /* pc_relative */
122 0, /* bitpos */
123 complain_overflow_bitfield, /* complain_on_overflow */
124 bfd_elf_generic_reloc, /* special_function */
125 "R_CRIS_8", /* name */
126 FALSE, /* partial_inplace */
127 0x0000, /* src_mask */
128 0x00ff, /* dst_mask */
129 FALSE), /* pcrel_offset */
130
131 /* A 16 bit absolute relocation. */
132 HOWTO (R_CRIS_16, /* type */
133 0, /* rightshift */
134 1, /* size (0 = byte, 1 = short, 2 = long) */
135 16, /* bitsize */
136 FALSE, /* pc_relative */
137 0, /* bitpos */
138 complain_overflow_bitfield, /* complain_on_overflow */
139 bfd_elf_generic_reloc, /* special_function */
140 "R_CRIS_16", /* name */
141 FALSE, /* partial_inplace */
142 0x00000000, /* src_mask */
143 0x0000ffff, /* dst_mask */
144 FALSE), /* pcrel_offset */
145
146 /* A 32 bit absolute relocation. */
147 HOWTO (R_CRIS_32, /* type */
148 0, /* rightshift */
149 2, /* size (0 = byte, 1 = short, 2 = long) */
150 32, /* bitsize */
151 FALSE, /* pc_relative */
152 0, /* bitpos */
153 /* We don't want overflow complaints for 64-bit vma builds
154 for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
155 32-bit ELF) where sym=0xc0001234.
156 Don't do this for the PIC relocs, as we don't expect to
157 see them with large offsets. */
158 complain_overflow_dont, /* complain_on_overflow */
159 bfd_elf_generic_reloc, /* special_function */
160 "R_CRIS_32", /* name */
161 FALSE, /* partial_inplace */
162 0x00000000, /* src_mask */
163 0xffffffff, /* dst_mask */
164 FALSE), /* pcrel_offset */
165
166 /* An 8 bit PC-relative relocation. */
167 HOWTO (R_CRIS_8_PCREL, /* type */
168 0, /* rightshift */
169 0, /* size (0 = byte, 1 = short, 2 = long) */
170 8, /* bitsize */
171 TRUE, /* pc_relative */
172 0, /* bitpos */
173 complain_overflow_bitfield, /* complain_on_overflow */
174 cris_elf_pcrel_reloc, /* special_function */
175 "R_CRIS_8_PCREL", /* name */
176 FALSE, /* partial_inplace */
177 0x0000, /* src_mask */
178 0x00ff, /* dst_mask */
179 TRUE), /* pcrel_offset */
180
181 /* A 16 bit PC-relative relocation. */
182 HOWTO (R_CRIS_16_PCREL, /* type */
183 0, /* rightshift */
184 1, /* size (0 = byte, 1 = short, 2 = long) */
185 16, /* bitsize */
186 TRUE, /* pc_relative */
187 0, /* bitpos */
188 complain_overflow_bitfield, /* complain_on_overflow */
189 cris_elf_pcrel_reloc, /* special_function */
190 "R_CRIS_16_PCREL", /* name */
191 FALSE, /* partial_inplace */
192 0x00000000, /* src_mask */
193 0x0000ffff, /* dst_mask */
194 TRUE), /* pcrel_offset */
195
196 /* A 32 bit PC-relative relocation. */
197 HOWTO (R_CRIS_32_PCREL, /* type */
198 0, /* rightshift */
199 2, /* size (0 = byte, 1 = short, 2 = long) */
200 32, /* bitsize */
201 TRUE, /* pc_relative */
202 0, /* bitpos */
203 complain_overflow_bitfield, /* complain_on_overflow */
204 cris_elf_pcrel_reloc, /* special_function */
205 "R_CRIS_32_PCREL", /* name */
206 FALSE, /* partial_inplace */
207 0x00000000, /* src_mask */
208 0xffffffff, /* dst_mask */
209 TRUE), /* pcrel_offset */
210
211 /* GNU extension to record C++ vtable hierarchy. */
212 HOWTO (R_CRIS_GNU_VTINHERIT, /* type */
213 0, /* rightshift */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
215 0, /* bitsize */
216 FALSE, /* pc_relative */
217 0, /* bitpos */
218 complain_overflow_dont, /* complain_on_overflow */
219 NULL, /* special_function */
220 "R_CRIS_GNU_VTINHERIT", /* name */
221 FALSE, /* partial_inplace */
222 0, /* src_mask */
223 0, /* dst_mask */
224 FALSE), /* pcrel_offset */
225
226 /* GNU extension to record C++ vtable member usage. */
227 HOWTO (R_CRIS_GNU_VTENTRY, /* type */
228 0, /* rightshift */
229 2, /* size (0 = byte, 1 = short, 2 = long) */
230 0, /* bitsize */
231 FALSE, /* pc_relative */
232 0, /* bitpos */
233 complain_overflow_dont, /* complain_on_overflow */
234 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
235 "R_CRIS_GNU_VTENTRY", /* name */
236 FALSE, /* partial_inplace */
237 0, /* src_mask */
238 0, /* dst_mask */
239 FALSE), /* pcrel_offset */
240
241 /* This is used only by the dynamic linker. The symbol should exist
242 both in the object being run and in some shared library. The
243 dynamic linker copies the data addressed by the symbol from the
244 shared library into the object, because the object being
245 run has to have the data at some particular address. */
246 HOWTO (R_CRIS_COPY, /* type */
247 0, /* rightshift */
248 2, /* size (0 = byte, 1 = short, 2 = long) */
249 32, /* bitsize */
250 FALSE, /* pc_relative */
251 0, /* bitpos */
252 complain_overflow_bitfield, /* complain_on_overflow */
253 bfd_elf_generic_reloc, /* special_function */
254 "R_CRIS_COPY", /* name */
255 FALSE, /* partial_inplace */
256 0, /* src_mask */
257 0, /* dst_mask */
258 FALSE), /* pcrel_offset */
259
260 /* Like R_CRIS_32, but used when setting global offset table entries. */
261 HOWTO (R_CRIS_GLOB_DAT, /* type */
262 0, /* rightshift */
263 2, /* size (0 = byte, 1 = short, 2 = long) */
264 32, /* bitsize */
265 FALSE, /* pc_relative */
266 0, /* bitpos */
267 complain_overflow_bitfield, /* complain_on_overflow */
268 bfd_elf_generic_reloc, /* special_function */
269 "R_CRIS_GLOB_DAT", /* name */
270 FALSE, /* partial_inplace */
271 0, /* src_mask */
272 0xffffffff, /* dst_mask */
273 FALSE), /* pcrel_offset */
274
275 /* Marks a procedure linkage table entry for a symbol. */
276 HOWTO (R_CRIS_JUMP_SLOT, /* type */
277 0, /* rightshift */
278 2, /* size (0 = byte, 1 = short, 2 = long) */
279 32, /* bitsize */
280 FALSE, /* pc_relative */
281 0, /* bitpos */
282 complain_overflow_bitfield, /* complain_on_overflow */
283 bfd_elf_generic_reloc, /* special_function */
284 "R_CRIS_JUMP_SLOT", /* name */
285 FALSE, /* partial_inplace */
286 0, /* src_mask */
287 0, /* dst_mask */
288 FALSE), /* pcrel_offset */
289
290 /* Used only by the dynamic linker. When the object is run, this
291 longword is set to the load address of the object, plus the
292 addend. */
293 HOWTO (R_CRIS_RELATIVE, /* type */
294 0, /* rightshift */
295 2, /* size (0 = byte, 1 = short, 2 = long) */
296 32, /* bitsize */
297 FALSE, /* pc_relative */
298 0, /* bitpos */
299 complain_overflow_bitfield, /* complain_on_overflow */
300 bfd_elf_generic_reloc, /* special_function */
301 "R_CRIS_RELATIVE", /* name */
302 FALSE, /* partial_inplace */
303 0, /* src_mask */
304 0xffffffff, /* dst_mask */
305 FALSE), /* pcrel_offset */
306
307 /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */
308 HOWTO (R_CRIS_16_GOT, /* type */
309 0, /* rightshift */
310 1, /* size (0 = byte, 1 = short, 2 = long) */
311 16, /* bitsize */
312 FALSE, /* pc_relative */
313 0, /* bitpos */
314 complain_overflow_bitfield, /* complain_on_overflow */
315 bfd_elf_generic_reloc, /* special_function */
316 "R_CRIS_16_GOT", /* name */
317 FALSE, /* partial_inplace */
318 0, /* src_mask */
319 0xffff, /* dst_mask */
320 FALSE), /* pcrel_offset */
321
322 HOWTO (R_CRIS_32_GOT, /* type */
323 0, /* rightshift */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
325 32, /* bitsize */
326 FALSE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_bitfield, /* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_CRIS_32_GOT", /* name */
331 FALSE, /* partial_inplace */
332 0, /* src_mask */
333 0xffffffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
335
336 /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
337 the GOT table for the symbol. */
338 HOWTO (R_CRIS_16_GOTPLT, /* type */
339 0, /* rightshift */
340 1, /* size (0 = byte, 1 = short, 2 = long) */
341 16, /* bitsize */
342 FALSE, /* pc_relative */
343 0, /* bitpos */
344 complain_overflow_bitfield, /* complain_on_overflow */
345 bfd_elf_generic_reloc, /* special_function */
346 "R_CRIS_16_GOTPLT", /* name */
347 FALSE, /* partial_inplace */
348 0, /* src_mask */
349 0xffff, /* dst_mask */
350 FALSE), /* pcrel_offset */
351
352 HOWTO (R_CRIS_32_GOTPLT, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 32, /* bitsize */
356 FALSE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_bitfield, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_CRIS_32_GOTPLT", /* name */
361 FALSE, /* partial_inplace */
362 0, /* src_mask */
363 0xffffffff, /* dst_mask */
364 FALSE), /* pcrel_offset */
365
366 /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
367 be necessary. */
368 HOWTO (R_CRIS_32_GOTREL, /* type */
369 0, /* rightshift */
370 2, /* size (0 = byte, 1 = short, 2 = long) */
371 32, /* bitsize */
372 FALSE, /* pc_relative */
373 0, /* bitpos */
374 complain_overflow_bitfield, /* complain_on_overflow */
375 bfd_elf_generic_reloc, /* special_function */
376 "R_CRIS_32_GOTREL", /* name */
377 FALSE, /* partial_inplace */
378 0, /* src_mask */
379 0xffffffff, /* dst_mask */
380 FALSE), /* pcrel_offset */
381
382 /* A 32-bit offset from GOT to entry for this symbol in PLT and request
383 to create PLT entry for symbol. */
384 HOWTO (R_CRIS_32_PLT_GOTREL, /* type */
385 0, /* rightshift */
386 2, /* size (0 = byte, 1 = short, 2 = long) */
387 32, /* bitsize */
388 FALSE, /* pc_relative */
389 0, /* bitpos */
390 complain_overflow_bitfield, /* complain_on_overflow */
391 bfd_elf_generic_reloc, /* special_function */
392 "R_CRIS_32_PLT_GOTREL", /* name */
393 FALSE, /* partial_inplace */
394 0, /* src_mask */
395 0xffffffff, /* dst_mask */
396 FALSE), /* pcrel_offset */
397
398 /* A 32-bit offset from PC (location after the relocation) + addend to
399 entry for this symbol in PLT and request to create PLT entry for
400 symbol. */
401 HOWTO (R_CRIS_32_PLT_PCREL, /* type */
402 0, /* rightshift */
403 2, /* size (0 = byte, 1 = short, 2 = long) */
404 32, /* bitsize */
405 TRUE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_bitfield, /* complain_on_overflow */
408 cris_elf_pcrel_reloc, /* special_function */
409 "R_CRIS_32_PLT_PCREL", /* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0xffffffff, /* dst_mask */
413 TRUE), /* pcrel_offset */
414
415 /* We don't handle these in any special manner and cross-format
416 linking is not supported; just recognize them enough to pass them
417 around. FIXME: do the same for most PIC relocs and add sanity
418 tests to actually refuse gracefully to handle these and PIC
419 relocs for cross-format linking. */
420 #define TLSHOWTO32(name) \
421 HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \
422 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE)
423 #define TLSHOWTO16X(name, X) \
424 HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \
425 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE)
426 #define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned)
427 #define TLSHOWTO16S(name) TLSHOWTO16X(name, signed)
428
429 TLSHOWTO32 (R_CRIS_32_GOT_GD),
430 TLSHOWTO16 (R_CRIS_16_GOT_GD),
431 TLSHOWTO32 (R_CRIS_32_GD),
432 TLSHOWTO32 (R_CRIS_DTP),
433 TLSHOWTO32 (R_CRIS_32_DTPREL),
434 TLSHOWTO16S (R_CRIS_16_DTPREL),
435 TLSHOWTO32 (R_CRIS_32_GOT_TPREL),
436 TLSHOWTO16S (R_CRIS_16_GOT_TPREL),
437 TLSHOWTO32 (R_CRIS_32_TPREL),
438 TLSHOWTO16S (R_CRIS_16_TPREL),
439 TLSHOWTO32 (R_CRIS_DTPMOD)
440 };
441 \f
442 /* Map BFD reloc types to CRIS ELF reloc types. */
443
444 struct cris_reloc_map
445 {
446 bfd_reloc_code_real_type bfd_reloc_val;
447 unsigned int cris_reloc_val;
448 };
449
450 static const struct cris_reloc_map cris_reloc_map [] =
451 {
452 { BFD_RELOC_NONE, R_CRIS_NONE },
453 { BFD_RELOC_8, R_CRIS_8 },
454 { BFD_RELOC_16, R_CRIS_16 },
455 { BFD_RELOC_32, R_CRIS_32 },
456 { BFD_RELOC_8_PCREL, R_CRIS_8_PCREL },
457 { BFD_RELOC_16_PCREL, R_CRIS_16_PCREL },
458 { BFD_RELOC_32_PCREL, R_CRIS_32_PCREL },
459 { BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT },
460 { BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY },
461 { BFD_RELOC_CRIS_COPY, R_CRIS_COPY },
462 { BFD_RELOC_CRIS_GLOB_DAT, R_CRIS_GLOB_DAT },
463 { BFD_RELOC_CRIS_JUMP_SLOT, R_CRIS_JUMP_SLOT },
464 { BFD_RELOC_CRIS_RELATIVE, R_CRIS_RELATIVE },
465 { BFD_RELOC_CRIS_16_GOT, R_CRIS_16_GOT },
466 { BFD_RELOC_CRIS_32_GOT, R_CRIS_32_GOT },
467 { BFD_RELOC_CRIS_16_GOTPLT, R_CRIS_16_GOTPLT },
468 { BFD_RELOC_CRIS_32_GOTPLT, R_CRIS_32_GOTPLT },
469 { BFD_RELOC_CRIS_32_GOTREL, R_CRIS_32_GOTREL },
470 { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
471 { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL },
472 { BFD_RELOC_CRIS_32_GOT_GD, R_CRIS_32_GOT_GD },
473 { BFD_RELOC_CRIS_16_GOT_GD, R_CRIS_16_GOT_GD },
474 { BFD_RELOC_CRIS_32_GD, R_CRIS_32_GD },
475 { BFD_RELOC_CRIS_DTP, R_CRIS_DTP },
476 { BFD_RELOC_CRIS_32_DTPREL, R_CRIS_32_DTPREL },
477 { BFD_RELOC_CRIS_16_DTPREL, R_CRIS_16_DTPREL },
478 { BFD_RELOC_CRIS_32_GOT_TPREL, R_CRIS_32_GOT_TPREL },
479 { BFD_RELOC_CRIS_16_GOT_TPREL, R_CRIS_16_GOT_TPREL },
480 { BFD_RELOC_CRIS_32_TPREL, R_CRIS_32_TPREL },
481 { BFD_RELOC_CRIS_16_TPREL, R_CRIS_16_TPREL },
482 { BFD_RELOC_CRIS_DTPMOD, R_CRIS_DTPMOD }
483 };
484
485 static reloc_howto_type *
486 cris_reloc_type_lookup (abfd, code)
487 bfd * abfd ATTRIBUTE_UNUSED;
488 bfd_reloc_code_real_type code;
489 {
490 unsigned int i;
491
492 for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
493 if (cris_reloc_map [i].bfd_reloc_val == code)
494 return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
495
496 return NULL;
497 }
498
499 static reloc_howto_type *
500 cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
501 {
502 unsigned int i;
503
504 for (i = 0;
505 i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]);
506 i++)
507 if (cris_elf_howto_table[i].name != NULL
508 && strcasecmp (cris_elf_howto_table[i].name, r_name) == 0)
509 return &cris_elf_howto_table[i];
510
511 return NULL;
512 }
513
514 /* Set the howto pointer for an CRIS ELF reloc. */
515
516 static void
517 cris_info_to_howto_rela (abfd, cache_ptr, dst)
518 bfd * abfd ATTRIBUTE_UNUSED;
519 arelent * cache_ptr;
520 Elf_Internal_Rela * dst;
521 {
522 enum elf_cris_reloc_type r_type;
523
524 r_type = ELF32_R_TYPE (dst->r_info);
525 BFD_ASSERT (r_type < (unsigned int) R_CRIS_max);
526 cache_ptr->howto = & cris_elf_howto_table [r_type];
527 }
528
529 bfd_reloc_status_type
530 cris_elf_pcrel_reloc (abfd, reloc_entry, symbol, data, input_section,
531 output_bfd, error_message)
532 bfd *abfd ATTRIBUTE_UNUSED;
533 arelent *reloc_entry;
534 asymbol *symbol;
535 PTR data ATTRIBUTE_UNUSED;
536 asection *input_section;
537 bfd *output_bfd;
538 char **error_message ATTRIBUTE_UNUSED;
539 {
540 /* By default (using only bfd_elf_generic_reloc when linking to
541 non-ELF formats) PC-relative relocs are relative to the beginning
542 of the reloc. CRIS PC-relative relocs are relative to the position
543 *after* the reloc because that's what pre-CRISv32 PC points to
544 after reading an insn field with that reloc. (For CRISv32, PC is
545 actually relative to the start of the insn, but we keep the old
546 definition.) Still, we use as much generic machinery as we can.
547
548 Only adjust when doing a final link. */
549 if (output_bfd == (bfd *) NULL)
550 reloc_entry->addend -= 1 << reloc_entry->howto->size;
551
552 return
553 bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
554 input_section, output_bfd, error_message);
555 }
556 \f
557 /* Support for core dump NOTE sections.
558 The slightly unintuitive code layout is an attempt to keep at least
559 some similarities with other ports, hoping to simplify general
560 changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */
561
562 static bfd_boolean
563 cris_elf_grok_prstatus (abfd, note)
564 bfd *abfd;
565 Elf_Internal_Note *note;
566 {
567 int offset;
568 size_t size;
569
570 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
571 switch (note->descsz)
572 {
573 default:
574 return FALSE;
575
576 case 202: /* Linux/CRISv32 */
577 /* pr_cursig */
578 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
579
580 /* pr_pid */
581 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
582
583 /* pr_reg */
584 offset = 70;
585 size = 128;
586
587 break;
588 }
589 else
590 switch (note->descsz)
591 {
592 default:
593 return FALSE;
594
595 case 214: /* Linux/CRIS */
596 /* pr_cursig */
597 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
598
599 /* pr_pid */
600 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
601
602 /* pr_reg */
603 offset = 70;
604 size = 140;
605
606 break;
607 }
608
609 /* Make a ".reg/999" section. */
610 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
611 size, note->descpos + offset);
612 }
613
614 static bfd_boolean
615 cris_elf_grok_psinfo (abfd, note)
616 bfd *abfd;
617 Elf_Internal_Note *note;
618 {
619 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
620 switch (note->descsz)
621 {
622 default:
623 return FALSE;
624
625 case 124: /* Linux/CRISv32 elf_prpsinfo */
626 elf_tdata (abfd)->core_program
627 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
628 elf_tdata (abfd)->core_command
629 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
630 }
631 else
632 switch (note->descsz)
633 {
634 default:
635 return FALSE;
636
637 case 124: /* Linux/CRIS elf_prpsinfo */
638 elf_tdata (abfd)->core_program
639 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
640 elf_tdata (abfd)->core_command
641 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
642 }
643
644 /* Note that for some reason, a spurious space is tacked
645 onto the end of the args in some (at least one anyway)
646 implementations, so strip it off if it exists. */
647
648 {
649 char *command = elf_tdata (abfd)->core_command;
650 int n = strlen (command);
651
652 if (0 < n && command[n - 1] == ' ')
653 command[n - 1] = '\0';
654 }
655
656 return TRUE;
657 }
658 \f
659 /* The name of the dynamic interpreter. This is put in the .interp
660 section. */
661
662 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
663
664 /* The size in bytes of an entry in the procedure linkage table. */
665
666 #define PLT_ENTRY_SIZE 20
667 #define PLT_ENTRY_SIZE_V32 26
668
669 /* The first entry in an absolute procedure linkage table looks like this. */
670
671 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
672 {
673 0xfc, 0xe1,
674 0x7e, 0x7e, /* push mof. */
675 0x7f, 0x0d, /* (dip [pc+]) */
676 0, 0, 0, 0, /* Replaced with address of .got + 4. */
677 0x30, 0x7a, /* move [...],mof */
678 0x7f, 0x0d, /* (dip [pc+]) */
679 0, 0, 0, 0, /* Replaced with address of .got + 8. */
680 0x30, 0x09 /* jump [...] */
681 };
682
683 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
684 {
685 0x84, 0xe2, /* subq 4,$sp */
686 0x6f, 0xfe, /* move.d 0,$acr */
687 0, 0, 0, 0, /* Replaced by address of .got + 4. */
688 0x7e, 0x7a, /* move $mof,[$sp] */
689 0x3f, 0x7a, /* move [$acr],$mof */
690 0x04, 0xf2, /* addq 4,acr */
691 0x6f, 0xfa, /* move.d [$acr],$acr */
692 0xbf, 0x09, /* jump $acr */
693 0xb0, 0x05, /* nop */
694 0, 0 /* Pad out to 26 bytes. */
695 };
696
697 /* Subsequent entries in an absolute procedure linkage table look like
698 this. */
699
700 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
701 {
702 0x7f, 0x0d, /* (dip [pc+]) */
703 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
704 0x30, 0x09, /* jump [...] */
705 0x3f, 0x7e, /* move [pc+],mof */
706 0, 0, 0, 0, /* Replaced with offset into relocation table. */
707 0x2f, 0xfe, /* add.d [pc+],pc */
708 0xec, 0xff,
709 0xff, 0xff /* Replaced with offset to start of .plt. */
710 };
711
712 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
713 {
714 0x6f, 0xfe, /* move.d 0,$acr */
715 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
716 0x6f, 0xfa, /* move.d [$acr],$acr */
717 0xbf, 0x09, /* jump $acr */
718 0xb0, 0x05, /* nop */
719 0x3f, 0x7e, /* move 0,mof */
720 0, 0, 0, 0, /* Replaced with offset into relocation table. */
721 0xbf, 0x0e, /* ba start_of_plt0_entry */
722 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */
723 0xb0, 0x05 /* nop */
724 };
725
726 /* The first entry in a PIC procedure linkage table looks like this. */
727
728 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
729 {
730 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */
731 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */
732 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */
733 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */
734 };
735
736 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
737 {
738 0x84, 0xe2, /* subq 4,$sp */
739 0x04, 0x01, /* addoq 4,$r0,$acr */
740 0x7e, 0x7a, /* move $mof,[$sp] */
741 0x3f, 0x7a, /* move [$acr],$mof */
742 0x04, 0xf2, /* addq 4,$acr */
743 0x6f, 0xfa, /* move.d [$acr],$acr */
744 0xbf, 0x09, /* jump $acr */
745 0xb0, 0x05, /* nop */
746 0, 0, /* Pad out to 26 bytes. */
747 0, 0, 0, 0,
748 0, 0, 0, 0
749 };
750
751 /* Subsequent entries in a PIC procedure linkage table look like this. */
752
753 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
754 {
755 0x6f, 0x0d, /* (bdap [pc+].d,r0) */
756 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
757 0x30, 0x09, /* jump [...] */
758 0x3f, 0x7e, /* move [pc+],mof */
759 0, 0, 0, 0, /* Replaced with offset into relocation table. */
760 0x2f, 0xfe, /* add.d [pc+],pc */
761 0xec, 0xff, /* Replaced with offset to start of .plt. */
762 0xff, 0xff
763 };
764
765 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
766 {
767 0x6f, 0x0d, /* addo.d 0,$r0,$acr */
768 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
769 0x6f, 0xfa, /* move.d [$acr],$acr */
770 0xbf, 0x09, /* jump $acr */
771 0xb0, 0x05, /* nop */
772 0x3f, 0x7e, /* move relocoffs,$mof */
773 0, 0, 0, 0, /* Replaced with offset into relocation table. */
774 0xbf, 0x0e, /* ba start_of_plt */
775 0, 0, 0, 0, /* Replaced with offset to start of .plt. */
776 0xb0, 0x05 /* nop */
777 };
778 \f
779 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
780 (and most other PIC/shlib stuff). Check that we don't drift away
781 without reason.
782
783 The CRIS linker, like the m68k and i386 linkers (and probably the rest
784 too) needs to keep track of the number of relocs that it decides to
785 copy in check_relocs for each symbol. This is so that it can discard
786 PC relative relocs if it doesn't need them when linking with
787 -Bsymbolic. We store the information in a field extending the regular
788 ELF linker hash table. */
789
790 /* This structure keeps track of the number of PC relative relocs we have
791 copied for a given symbol. */
792
793 struct elf_cris_pcrel_relocs_copied
794 {
795 /* Next section. */
796 struct elf_cris_pcrel_relocs_copied *next;
797 /* A section in dynobj. */
798 asection *section;
799 /* Number of relocs copied in this section. */
800 bfd_size_type count;
801 };
802
803 /* CRIS ELF linker hash entry. */
804
805 struct elf_cris_link_hash_entry
806 {
807 struct elf_link_hash_entry root;
808
809 /* Number of PC relative relocs copied for this symbol. */
810 struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
811
812 /* The GOTPLT references are CRIS-specific; the goal is to avoid having
813 both a general GOT and a PLT-specific GOT entry for the same symbol,
814 when it is referenced both as a function and as a function pointer.
815
816 Number of GOTPLT references for a function. */
817 bfd_signed_vma gotplt_refcount;
818
819 /* Actual GOTPLT index for this symbol, if applicable, or zero if not
820 (zero is never used as an index). FIXME: We should be able to fold
821 this with gotplt_refcount in a union, like the got and plt unions in
822 elf_link_hash_entry. */
823 bfd_size_type gotplt_offset;
824
825 /* The root.got.refcount is the sum of the regular reference counts
826 (this) and those members below. We have to keep a separate count
827 to track when we've found the first (or last) reference to a
828 regular got entry. The offset is in root.got.offset. */
829 bfd_signed_vma reg_got_refcount;
830
831 /* Similar to the above, the number of reloc references to this
832 symbols that need a R_CRIS_32_TPREL slot. The offset is in
833 root.got.offset, because this and .dtp_refcount can't validly
834 happen when there's also a regular GOT entry; that's invalid
835 input for which an error is emitted. */
836 bfd_signed_vma tprel_refcount;
837
838 /* Similar to the above, the number of reloc references to this
839 symbols that need a R_CRIS_DTP slot. The offset is in
840 root.got.offset; plus 4 if .tprel_refcount > 0. */
841 bfd_signed_vma dtp_refcount;
842 };
843
844 /* The local_got_refcounts and local_got_offsets are a multiple of
845 LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the
846 refcount for GOT itself, see code), with the summary / group offset
847 for local symbols located at offset N, reference counts for
848 ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP
849 relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N +
850 3*LSNUM. */
851
852 #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info)
853 #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info)
854 #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info)
855 #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4)
856
857 /* CRIS ELF linker hash table. */
858
859 struct elf_cris_link_hash_table
860 {
861 struct elf_link_hash_table root;
862
863 /* We can't use the PLT offset and calculate to get the GOTPLT offset,
864 since we try and avoid creating GOTPLT:s when there's already a GOT.
865 Instead, we keep and update the next available index here. */
866 bfd_size_type next_gotplt_entry;
867
868 /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have
869 been seen for any input; if != 0, then the constant-offset
870 R_CRIS_DTPMOD is needed for this DSO/executable. This turns
871 negative at relocation, so that we don't need an extra flag for
872 when the reloc is output. */
873 bfd_signed_vma dtpmod_refcount;
874 };
875
876 /* Traverse a CRIS ELF linker hash table. */
877
878 #define elf_cris_link_hash_traverse(table, func, info) \
879 (elf_link_hash_traverse \
880 (&(table)->root, \
881 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
882 (info)))
883
884 /* Get the CRIS ELF linker hash table from a link_info structure. */
885
886 #define elf_cris_hash_table(p) \
887 ((struct elf_cris_link_hash_table *) (p)->hash)
888
889 /* Get the CRIS ELF linker hash entry from a regular hash entry (the
890 "parent class"). The .root reference is just a simple type
891 check on the argument. */
892
893 #define elf_cris_hash_entry(p) \
894 ((struct elf_cris_link_hash_entry *) (&(p)->root))
895
896 /* Create an entry in a CRIS ELF linker hash table. */
897
898 static struct bfd_hash_entry *
899 elf_cris_link_hash_newfunc (entry, table, string)
900 struct bfd_hash_entry *entry;
901 struct bfd_hash_table *table;
902 const char *string;
903 {
904 struct elf_cris_link_hash_entry *ret =
905 (struct elf_cris_link_hash_entry *) entry;
906
907 /* Allocate the structure if it has not already been allocated by a
908 subclass. */
909 if (ret == (struct elf_cris_link_hash_entry *) NULL)
910 ret = ((struct elf_cris_link_hash_entry *)
911 bfd_hash_allocate (table,
912 sizeof (struct elf_cris_link_hash_entry)));
913 if (ret == (struct elf_cris_link_hash_entry *) NULL)
914 return (struct bfd_hash_entry *) ret;
915
916 /* Call the allocation method of the superclass. */
917 ret = ((struct elf_cris_link_hash_entry *)
918 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
919 table, string));
920 if (ret != (struct elf_cris_link_hash_entry *) NULL)
921 {
922 ret->pcrel_relocs_copied = NULL;
923 ret->gotplt_refcount = 0;
924 ret->gotplt_offset = 0;
925 ret->dtp_refcount = 0;
926 ret->tprel_refcount = 0;
927 ret->reg_got_refcount = 0;
928 }
929
930 return (struct bfd_hash_entry *) ret;
931 }
932
933 /* Create a CRIS ELF linker hash table. */
934
935 static struct bfd_link_hash_table *
936 elf_cris_link_hash_table_create (abfd)
937 bfd *abfd;
938 {
939 struct elf_cris_link_hash_table *ret;
940 bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
941
942 ret = ((struct elf_cris_link_hash_table *) bfd_malloc (amt));
943 if (ret == (struct elf_cris_link_hash_table *) NULL)
944 return NULL;
945
946 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
947 elf_cris_link_hash_newfunc,
948 sizeof (struct elf_cris_link_hash_entry)))
949 {
950 free (ret);
951 return NULL;
952 }
953
954 /* Initialize to skip over the first three entries in the gotplt; they
955 are used for run-time symbol evaluation. */
956 ret->next_gotplt_entry = 12;
957
958 /* We haven't seen any R_CRIS_nn_GOT_TPREL initially. */
959 ret->dtpmod_refcount = 0;
960
961 return &ret->root.root;
962 }
963 \f
964 /* Perform a single relocation. By default we use the standard BFD
965 routines, with a few tweaks. */
966
967 static bfd_reloc_status_type
968 cris_final_link_relocate (howto, input_bfd, input_section, contents, rel,
969 relocation)
970 reloc_howto_type * howto;
971 bfd * input_bfd;
972 asection * input_section;
973 bfd_byte * contents;
974 Elf_Internal_Rela * rel;
975 bfd_vma relocation;
976 {
977 bfd_reloc_status_type r;
978 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
979
980 /* PC-relative relocations are relative to the position *after*
981 the reloc. Note that for R_CRIS_8_PCREL the adjustment is
982 not a single byte, since PC must be 16-bit-aligned. */
983 switch (r_type)
984 {
985 /* Check that the 16-bit GOT relocs are positive. */
986 case R_CRIS_16_GOTPLT:
987 case R_CRIS_16_GOT:
988 if ((bfd_signed_vma) relocation < 0)
989 return bfd_reloc_overflow;
990 break;
991
992 case R_CRIS_32_PLT_PCREL:
993 case R_CRIS_32_PCREL:
994 relocation -= 2;
995 /* Fall through. */
996 case R_CRIS_8_PCREL:
997 case R_CRIS_16_PCREL:
998 relocation -= 2;
999 break;
1000
1001 default:
1002 break;
1003 }
1004
1005 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1006 contents, rel->r_offset,
1007 relocation, rel->r_addend);
1008 return r;
1009 }
1010 \f
1011
1012 /* The number of errors left before we stop outputting reloc-specific
1013 explanatory messages. By coincidence, this works nicely together
1014 with the default number of messages you'll get from LD about
1015 "relocation truncated to fit" messages before you get an
1016 "additional relocation overflows omitted from the output". */
1017 static int additional_relocation_error_msg_count = 10;
1018
1019 /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
1020 copied, for further comments. */
1021
1022 static bfd_boolean
1023 cris_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1024 contents, relocs, local_syms, local_sections)
1025 bfd *output_bfd ATTRIBUTE_UNUSED;
1026 struct bfd_link_info *info;
1027 bfd *input_bfd;
1028 asection *input_section;
1029 bfd_byte *contents;
1030 Elf_Internal_Rela *relocs;
1031 Elf_Internal_Sym *local_syms;
1032 asection **local_sections;
1033 {
1034 bfd *dynobj;
1035 Elf_Internal_Shdr *symtab_hdr;
1036 struct elf_link_hash_entry **sym_hashes;
1037 bfd_vma *local_got_offsets;
1038 asection *sgot;
1039 asection *splt;
1040 asection *sreloc;
1041 Elf_Internal_Rela *rel;
1042 Elf_Internal_Rela *relend;
1043 asection *srelgot;
1044
1045 dynobj = elf_hash_table (info)->dynobj;
1046 local_got_offsets = elf_local_got_offsets (input_bfd);
1047 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1048 sym_hashes = elf_sym_hashes (input_bfd);
1049 relend = relocs + input_section->reloc_count;
1050
1051 sgot = NULL;
1052 splt = NULL;
1053 sreloc = NULL;
1054 srelgot = NULL;
1055
1056 if (dynobj != NULL)
1057 {
1058 splt = bfd_get_section_by_name (dynobj, ".plt");
1059 sgot = bfd_get_section_by_name (dynobj, ".got");
1060 }
1061
1062 for (rel = relocs; rel < relend; rel ++)
1063 {
1064 reloc_howto_type *howto;
1065 unsigned long r_symndx;
1066 Elf_Internal_Sym *sym;
1067 asection *sec;
1068 struct elf_link_hash_entry *h;
1069 bfd_vma relocation;
1070 bfd_reloc_status_type r;
1071 const char *symname = NULL;
1072 enum elf_cris_reloc_type r_type;
1073
1074 r_type = ELF32_R_TYPE (rel->r_info);
1075
1076 if ( r_type == R_CRIS_GNU_VTINHERIT
1077 || r_type == R_CRIS_GNU_VTENTRY)
1078 continue;
1079
1080 r_symndx = ELF32_R_SYM (rel->r_info);
1081 howto = cris_elf_howto_table + r_type;
1082 h = NULL;
1083 sym = NULL;
1084 sec = NULL;
1085
1086 if (r_symndx < symtab_hdr->sh_info)
1087 {
1088 sym = local_syms + r_symndx;
1089 sec = local_sections [r_symndx];
1090 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1091
1092 symname = (bfd_elf_string_from_elf_section
1093 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1094 if (symname == NULL)
1095 symname = bfd_section_name (input_bfd, sec);
1096 }
1097 else
1098 {
1099 bfd_boolean warned;
1100 bfd_boolean unresolved_reloc;
1101
1102 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1103 r_symndx, symtab_hdr, sym_hashes,
1104 h, sec, relocation,
1105 unresolved_reloc, warned);
1106
1107 symname = h->root.root.string;
1108
1109 if (unresolved_reloc
1110 /* Perhaps we should detect the cases that
1111 sec->output_section is expected to be NULL like i386 and
1112 m68k, but apparently (and according to elfxx-ia64.c) all
1113 valid cases are where the symbol is defined in a shared
1114 object which we link dynamically against. This includes
1115 PLT relocs for which we've created a PLT entry and other
1116 relocs for which we're prepared to create dynamic
1117 relocations.
1118
1119 For now, new situations cause us to just err when
1120 sec->output_offset is NULL but the object with the symbol
1121 is *not* dynamically linked against. Thus this will
1122 automatically remind us so we can see if there are other
1123 valid cases we need to revisit. */
1124 && (sec->owner->flags & DYNAMIC) != 0)
1125 relocation = 0;
1126
1127 else if (h->root.type == bfd_link_hash_defined
1128 || h->root.type == bfd_link_hash_defweak)
1129 {
1130 /* Here follow the cases where the relocation value must
1131 be zero (or when further handling is simplified when
1132 zero). I can't claim to understand the various
1133 conditions and they weren't described in the files
1134 where I copied them from (elf32-m68k.c and
1135 elf32-i386.c), but let's mention examples of where
1136 they happen. FIXME: Perhaps define and use a
1137 dynamic_symbol_p function like ia64.
1138
1139 - When creating a shared library, we can have an
1140 ordinary relocation for a symbol defined in a shared
1141 library (perhaps the one we create). We then make
1142 the relocation value zero, as the value seen now will
1143 be added into the relocation addend in this shared
1144 library, but must be handled only at dynamic-link
1145 time. FIXME: Not sure this example covers the
1146 h->elf_link_hash_flags test, though it's there in
1147 other targets. */
1148 if (info->shared
1149 && ((! info->symbolic && h->dynindx != -1)
1150 || !h->def_regular)
1151 && (input_section->flags & SEC_ALLOC) != 0
1152 && (r_type == R_CRIS_8
1153 || r_type == R_CRIS_16
1154 || r_type == R_CRIS_32
1155 || r_type == R_CRIS_8_PCREL
1156 || r_type == R_CRIS_16_PCREL
1157 || r_type == R_CRIS_32_PCREL))
1158 relocation = 0;
1159 else if (!info->relocatable && unresolved_reloc)
1160 {
1161 _bfd_error_handler
1162 (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1163 input_bfd,
1164 input_section,
1165 cris_elf_howto_table[r_type].name,
1166 symname);
1167 bfd_set_error (bfd_error_bad_value);
1168 return FALSE;
1169 }
1170 }
1171 }
1172
1173 if (sec != NULL && elf_discarded_section (sec))
1174 {
1175 /* For relocs against symbols from removed linkonce sections,
1176 or sections discarded by a linker script, we just want the
1177 section contents zeroed. Avoid any special processing. */
1178 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
1179 rel->r_info = 0;
1180 rel->r_addend = 0;
1181 continue;
1182 }
1183
1184 if (info->relocatable)
1185 continue;
1186
1187 switch (r_type)
1188 {
1189 case R_CRIS_16_GOTPLT:
1190 case R_CRIS_32_GOTPLT:
1191 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1192 but we require a PLT, and the PLT handling will take care of
1193 filling in the PLT-specific GOT entry. For the GOT offset,
1194 calculate it as we do when filling it in for the .got.plt
1195 section. If we don't have a PLT, punt to GOT handling. */
1196 if (h != NULL
1197 && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1198 {
1199 asection *sgotplt
1200 = bfd_get_section_by_name (dynobj, ".got.plt");
1201 bfd_vma got_offset;
1202
1203 BFD_ASSERT (h->dynindx != -1);
1204 BFD_ASSERT (sgotplt != NULL);
1205
1206 got_offset
1207 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1208
1209 relocation = got_offset;
1210 break;
1211 }
1212
1213 /* We didn't make a PLT entry for this symbol. Maybe everything is
1214 folded into the GOT. Other than folding, this happens when
1215 statically linking PIC code, or when using -Bsymbolic. Check
1216 that we instead have a GOT entry as done for us by
1217 elf_cris_adjust_dynamic_symbol, and drop through into the
1218 ordinary GOT cases. This must not happen for the
1219 executable, because any reference it does to a function
1220 that is satisfied by a DSO must generate a PLT. We assume
1221 these call-specific relocs don't address non-functions. */
1222 if (h != NULL
1223 && (h->got.offset == (bfd_vma) -1
1224 || (!info->shared
1225 && !(h->def_regular
1226 || (!h->def_dynamic
1227 && h->root.type == bfd_link_hash_undefweak)))))
1228 {
1229 (*_bfd_error_handler)
1230 ((h->got.offset == (bfd_vma) -1)
1231 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1232 " against symbol `%s'")
1233 : _("%B, section %A: No PLT for relocation %s"
1234 " against symbol `%s'"),
1235 input_bfd,
1236 input_section,
1237 cris_elf_howto_table[r_type].name,
1238 (symname != NULL && symname[0] != '\0'
1239 ? symname : _("[whose name is lost]")));
1240
1241 /* FIXME: Perhaps blaming input is not the right thing to
1242 do; this is probably an internal error. But it is true
1243 that we didn't like that particular input. */
1244 bfd_set_error (bfd_error_bad_value);
1245 return FALSE;
1246 }
1247 /* Fall through. */
1248
1249 /* The size of the actual relocation is not used here; we only
1250 fill in the GOT table here. */
1251 case R_CRIS_16_GOT:
1252 case R_CRIS_32_GOT:
1253 {
1254 bfd_vma off;
1255
1256 /* Note that despite using RELA relocations, the .got contents
1257 is always filled in with the link-relative relocation
1258 value; the addend. */
1259
1260 if (h != NULL)
1261 {
1262 off = h->got.offset;
1263 BFD_ASSERT (off != (bfd_vma) -1);
1264
1265 if (!elf_hash_table (info)->dynamic_sections_created
1266 || (! info->shared
1267 && (h->def_regular
1268 || h->type == STT_FUNC
1269 || h->needs_plt))
1270 || (info->shared
1271 && (info->symbolic || h->dynindx == -1)
1272 && h->def_regular))
1273 {
1274 /* This wasn't checked above for ! info->shared, but
1275 must hold there if we get here; the symbol must
1276 be defined in the regular program or be undefweak
1277 or be a function or otherwise need a PLT. */
1278 BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1279 || info->shared
1280 || h->def_regular
1281 || h->type == STT_FUNC
1282 || h->needs_plt
1283 || h->root.type == bfd_link_hash_undefweak);
1284
1285 /* This is actually a static link, or it is a
1286 -Bsymbolic link and the symbol is defined locally,
1287 or is undefweak, or the symbol was forced to be
1288 local because of a version file, or we're not
1289 creating a dynamic object. We must initialize this
1290 entry in the global offset table. Since the offset
1291 must always be a multiple of 4, we use the least
1292 significant bit to record whether we have
1293 initialized it already.
1294
1295 If this GOT entry should be runtime-initialized, we
1296 will create a .rela.got relocation entry to
1297 initialize the value. This is done in the
1298 finish_dynamic_symbol routine. */
1299 if ((off & 1) != 0)
1300 off &= ~1;
1301 else
1302 {
1303 bfd_put_32 (output_bfd, relocation,
1304 sgot->contents + off);
1305 h->got.offset |= 1;
1306 }
1307 }
1308 }
1309 else
1310 {
1311 BFD_ASSERT (local_got_offsets != NULL
1312 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1313
1314 off = local_got_offsets[r_symndx];
1315
1316 /* The offset must always be a multiple of 4. We use
1317 the least significant bit to record whether we have
1318 already generated the necessary reloc. */
1319 if ((off & 1) != 0)
1320 off &= ~1;
1321 else
1322 {
1323 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1324
1325 if (info->shared)
1326 {
1327 Elf_Internal_Rela outrel;
1328 bfd_byte *loc;
1329
1330 if (srelgot == NULL)
1331 srelgot
1332 = bfd_get_section_by_name (dynobj, ".rela.got");
1333 BFD_ASSERT (srelgot != NULL);
1334
1335 outrel.r_offset = (sgot->output_section->vma
1336 + sgot->output_offset
1337 + off);
1338 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1339 outrel.r_addend = relocation;
1340 loc = srelgot->contents;
1341 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1342 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1343 }
1344
1345 local_got_offsets[r_symndx] |= 1;
1346 }
1347 }
1348
1349 relocation = sgot->output_offset + off;
1350 if (rel->r_addend != 0)
1351 {
1352 /* We can't do anything for a relocation which is against
1353 a symbol *plus offset*. GOT holds relocations for
1354 symbols. Make this an error; the compiler isn't
1355 allowed to pass us these kinds of things. */
1356 if (h == NULL)
1357 (*_bfd_error_handler)
1358 (_("%B, section %A: relocation %s with non-zero addend %d"
1359 " against local symbol"),
1360 input_bfd,
1361 input_section,
1362 cris_elf_howto_table[r_type].name,
1363 rel->r_addend);
1364 else
1365 (*_bfd_error_handler)
1366 (_("%B, section %A: relocation %s with non-zero addend %d"
1367 " against symbol `%s'"),
1368 input_bfd,
1369 input_section,
1370 cris_elf_howto_table[r_type].name,
1371 rel->r_addend,
1372 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1373
1374 bfd_set_error (bfd_error_bad_value);
1375 return FALSE;
1376 }
1377 }
1378 break;
1379
1380 case R_CRIS_32_GOTREL:
1381 /* This relocation must only be performed against local symbols.
1382 It's also ok when we link a program and the symbol is either
1383 defined in an ordinary (non-DSO) object or is undefined weak. */
1384 if (h != NULL
1385 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1386 && !(!info->shared
1387 && (h->def_regular
1388 || (!h->def_dynamic
1389 && h->root.type == bfd_link_hash_undefweak))))
1390 {
1391 (*_bfd_error_handler)
1392 (_("%B, section %A: relocation %s is"
1393 " not allowed for global symbol: `%s'"),
1394 input_bfd,
1395 input_section,
1396 cris_elf_howto_table[r_type].name,
1397 symname);
1398 bfd_set_error (bfd_error_bad_value);
1399 return FALSE;
1400 }
1401
1402 /* This can happen if we get a link error with the input ELF
1403 variant mismatching the output variant. Emit an error so
1404 it's noticed if it happens elsewhere. */
1405 if (sgot == NULL)
1406 {
1407 (*_bfd_error_handler)
1408 (_("%B, section %A: relocation %s with no GOT created"),
1409 input_bfd,
1410 input_section,
1411 cris_elf_howto_table[r_type].name);
1412 bfd_set_error (bfd_error_bad_value);
1413 return FALSE;
1414 }
1415
1416 /* This relocation is like a PC-relative one, except the
1417 reference point is the location of GOT. Note that
1418 sgot->output_offset is not involved in this calculation. We
1419 always want the start of entire .got section, not the
1420 position after the reserved header. */
1421 relocation -= sgot->output_section->vma;
1422 break;
1423
1424 case R_CRIS_32_PLT_PCREL:
1425 /* Relocation is to the entry for this symbol in the
1426 procedure linkage table. */
1427
1428 /* Resolve a PLT_PCREL reloc against a local symbol directly,
1429 without using the procedure linkage table. */
1430 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1431 break;
1432
1433 if (h->plt.offset == (bfd_vma) -1
1434 || splt == NULL)
1435 {
1436 /* We didn't make a PLT entry for this symbol. This
1437 happens when statically linking PIC code, or when
1438 using -Bsymbolic. */
1439 break;
1440 }
1441
1442 relocation = (splt->output_section->vma
1443 + splt->output_offset
1444 + h->plt.offset);
1445 break;
1446
1447 case R_CRIS_32_PLT_GOTREL:
1448 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1449 start of the .got section. See also comment at
1450 R_CRIS_32_GOT. */
1451 relocation -= sgot->output_section->vma;
1452
1453 /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1454 without using the procedure linkage table. */
1455 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1456 break;
1457
1458 if (h->plt.offset == (bfd_vma) -1
1459 || splt == NULL)
1460 {
1461 /* We didn't make a PLT entry for this symbol. This
1462 happens when statically linking PIC code, or when
1463 using -Bsymbolic. */
1464 break;
1465 }
1466
1467 relocation = (splt->output_section->vma
1468 + splt->output_offset
1469 + h->plt.offset
1470 - sgot->output_section->vma);
1471 break;
1472
1473 case R_CRIS_8_PCREL:
1474 case R_CRIS_16_PCREL:
1475 case R_CRIS_32_PCREL:
1476 /* If the symbol was local, we need no shlib-specific handling. */
1477 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1478 break;
1479
1480 /* Fall through. */
1481 case R_CRIS_8:
1482 case R_CRIS_16:
1483 case R_CRIS_32:
1484 if (info->shared
1485 && r_symndx != 0
1486 && (input_section->flags & SEC_ALLOC) != 0
1487 && ((r_type != R_CRIS_8_PCREL
1488 && r_type != R_CRIS_16_PCREL
1489 && r_type != R_CRIS_32_PCREL)
1490 || (!info->symbolic
1491 || !h->def_regular)))
1492 {
1493 Elf_Internal_Rela outrel;
1494 bfd_byte *loc;
1495 bfd_boolean skip, relocate;
1496
1497 /* When generating a shared object, these relocations
1498 are copied into the output file to be resolved at run
1499 time. */
1500
1501 if (sreloc == NULL)
1502 {
1503 sreloc = _bfd_elf_get_dynamic_reloc_section
1504 (input_bfd, input_section, /*rela?*/ TRUE);
1505 /* The section should have been created in cris_elf_check_relocs,
1506 but that function will not be called for objects which fail in
1507 cris_elf_merge_private_bfd_data. */
1508 if (sreloc == NULL)
1509 {
1510 bfd_set_error (bfd_error_bad_value);
1511 return FALSE;
1512 }
1513 }
1514
1515 skip = FALSE;
1516 relocate = FALSE;
1517
1518 outrel.r_offset =
1519 _bfd_elf_section_offset (output_bfd, info, input_section,
1520 rel->r_offset);
1521 if (outrel.r_offset == (bfd_vma) -1)
1522 skip = TRUE;
1523 else if (outrel.r_offset == (bfd_vma) -2)
1524 skip = TRUE, relocate = TRUE;
1525 outrel.r_offset += (input_section->output_section->vma
1526 + input_section->output_offset);
1527
1528 if (skip)
1529 memset (&outrel, 0, sizeof outrel);
1530 /* h->dynindx may be -1 if the symbol was marked to
1531 become local. */
1532 else if (h != NULL
1533 && ((! info->symbolic && h->dynindx != -1)
1534 || !h->def_regular))
1535 {
1536 BFD_ASSERT (h->dynindx != -1);
1537 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1538 outrel.r_addend = relocation + rel->r_addend;
1539 }
1540 else
1541 {
1542 outrel.r_addend = relocation + rel->r_addend;
1543
1544 if (r_type == R_CRIS_32)
1545 {
1546 relocate = TRUE;
1547 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1548 }
1549 else
1550 {
1551 long indx;
1552
1553 if (bfd_is_abs_section (sec))
1554 indx = 0;
1555 else if (sec == NULL || sec->owner == NULL)
1556 {
1557 bfd_set_error (bfd_error_bad_value);
1558 return FALSE;
1559 }
1560 else
1561 {
1562 asection *osec;
1563
1564 /* We are turning this relocation into one
1565 against a section symbol. It would be
1566 proper to subtract the symbol's value,
1567 osec->vma, from the emitted reloc addend,
1568 but ld.so expects buggy relocs. */
1569 osec = sec->output_section;
1570 indx = elf_section_data (osec)->dynindx;
1571 if (indx == 0)
1572 {
1573 struct elf_cris_link_hash_table *htab;
1574 htab = elf_cris_hash_table (info);
1575 osec = htab->root.text_index_section;
1576 indx = elf_section_data (osec)->dynindx;
1577 }
1578 BFD_ASSERT (indx != 0);
1579 }
1580
1581 outrel.r_info = ELF32_R_INFO (indx, r_type);
1582 }
1583 }
1584
1585 loc = sreloc->contents;
1586 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1587 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1588
1589 /* This reloc will be computed at runtime, so there's no
1590 need to do anything now, except for R_CRIS_32 relocations
1591 that have been turned into R_CRIS_RELATIVE. */
1592 if (!relocate)
1593 continue;
1594 }
1595
1596 break;
1597
1598 case R_CRIS_16_DTPREL:
1599 case R_CRIS_32_DTPREL:
1600 /* This relocation must only be performed against local
1601 symbols. It's also ok when we link a program and the
1602 symbol is defined in an ordinary (non-DSO) object (if
1603 it's undefined there, we've already seen an error). */
1604 if (h != NULL
1605 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1606 && (info->shared
1607 || (!h->def_regular
1608 && h->root.type != bfd_link_hash_undefined)))
1609 {
1610 (*_bfd_error_handler)
1611 ((h->root.type == bfd_link_hash_undefined)
1612 /* We shouldn't get here for GCC-emitted code. */
1613 ? _("%B, section %A: relocation %s has an undefined"
1614 " reference to `%s', perhaps a declaration mixup?")
1615 : ("%B, section %A: relocation %s is"
1616 " not allowed for `%s', a global symbol with default"
1617 " visibility, perhaps a declaration mixup?"),
1618 input_bfd,
1619 input_section,
1620 cris_elf_howto_table[r_type].name,
1621 symname != NULL && symname[0] != '\0'
1622 ? symname : _("[whose name is lost]"));
1623 bfd_set_error (bfd_error_bad_value);
1624 return FALSE;
1625 }
1626
1627 BFD_ASSERT (elf_cris_hash_table (info)->dtpmod_refcount != 0);
1628
1629 /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1630 already done so. Note that we do this in .got.plt, not
1631 in .got, as .got.plt contains the first part, still the
1632 reloc is against .got, because the linker script directs
1633 (is required to direct) them both into .got. */
1634 if (elf_cris_hash_table (info)->dtpmod_refcount > 0)
1635 {
1636 asection *sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1637 BFD_ASSERT (sgotplt != NULL);
1638
1639 if (info->shared)
1640 {
1641 Elf_Internal_Rela outrel;
1642 bfd_byte *loc;
1643
1644 if (srelgot == NULL)
1645 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1646 BFD_ASSERT (srelgot != NULL);
1647 loc = srelgot->contents;
1648 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1649
1650 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
1651 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1652 outrel.r_offset = (sgotplt->output_section->vma
1653 + sgotplt->output_offset
1654 + 12);
1655 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
1656 outrel.r_addend = 0;
1657 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1658 }
1659 else
1660 {
1661 /* For an executable, the GOT entry contents is known. */
1662 bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
1663 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1664 }
1665
1666 /* Reverse the sign to mark that we've emitted the
1667 required GOT entry. */
1668 elf_cris_hash_table (info)->dtpmod_refcount
1669 = -elf_cris_hash_table (info)->dtpmod_refcount;
1670 }
1671
1672 /* The thread-based offset to the local symbol is the
1673 relocation. */
1674 relocation -= elf_hash_table (info)->tls_sec == NULL
1675 ? 0 : elf_hash_table (info)->tls_sec->vma;
1676 break;
1677
1678 case R_CRIS_32_GD:
1679 if (info->shared)
1680 {
1681 bfd_set_error (bfd_error_invalid_operation);
1682
1683 /* We've already informed in cris_elf_check_relocs that
1684 this is an error. */
1685 return FALSE;
1686 }
1687 /* Fall through. */
1688
1689 case R_CRIS_16_GOT_GD:
1690 case R_CRIS_32_GOT_GD:
1691 if (rel->r_addend != 0)
1692 {
1693 /* We can't do anything for a relocation which is against a
1694 symbol *plus offset*. The GOT holds relocations for
1695 symbols. Make this an error; the compiler isn't allowed
1696 to pass us these kinds of things. */
1697 (*_bfd_error_handler)
1698 (_("%B, section %A: relocation %s with non-zero addend %d"
1699 " against symbol `%s'"),
1700 input_bfd,
1701 input_section,
1702 cris_elf_howto_table[r_type].name,
1703 rel->r_addend,
1704 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1705
1706 bfd_set_error (bfd_error_bad_value);
1707 return FALSE;
1708 }
1709
1710 if (!info->shared && (h == NULL || h->def_regular))
1711 {
1712 /* Known contents of the GOT. */
1713 bfd_vma off;
1714
1715 /* The symbol is defined in the program, so just write
1716 (1, known_tpoffset) into the GOT. */
1717 relocation -= elf_hash_table (info)->tls_sec->vma;
1718
1719 if (h != NULL)
1720 {
1721 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1722 ? h->got.offset + 4 : h->got.offset;
1723 }
1724 else
1725 {
1726 off = local_got_offsets[r_symndx];
1727 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1728 off += 4;
1729 }
1730
1731 /* We use bit 1 of the offset as a flag for GOT entry with
1732 the R_CRIS_DTP reloc, setting it when we've emitted the
1733 GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL
1734 relocs. */
1735 if ((off & 2) == 0)
1736 {
1737 off &= ~3;
1738
1739 if (h != NULL)
1740 h->got.offset |= 2;
1741 else
1742 local_got_offsets[r_symndx] |= 2;
1743
1744 bfd_put_32 (output_bfd, 1, sgot->contents + off);
1745 bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
1746 }
1747 else
1748 off &= ~3;
1749
1750 relocation = sgot->output_offset + off
1751 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1752 }
1753 else
1754 {
1755 /* Not all parts of the GOT entry are known; emit a real
1756 relocation. */
1757 bfd_vma off;
1758
1759 if (h != NULL)
1760 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1761 ? h->got.offset + 4 : h->got.offset;
1762 else
1763 {
1764 off = local_got_offsets[r_symndx];
1765 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1766 off += 4;
1767 }
1768
1769 /* See above re bit 1 and bit 0 usage. */
1770 if ((off & 2) == 0)
1771 {
1772 Elf_Internal_Rela outrel;
1773 bfd_byte *loc;
1774
1775 off &= ~3;
1776
1777 if (h != NULL)
1778 h->got.offset |= 2;
1779 else
1780 local_got_offsets[r_symndx] |= 2;
1781
1782 /* Clear the target contents of the GOT (just as a
1783 gesture; it's already cleared on allocation): this
1784 relocation is not like the other dynrelocs. */
1785 bfd_put_32 (output_bfd, 0, sgot->contents + off);
1786 bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
1787
1788 if (srelgot == NULL)
1789 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1790 BFD_ASSERT (srelgot != NULL);
1791
1792 if (h != NULL && h->dynindx != -1)
1793 {
1794 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
1795 relocation = 0;
1796 }
1797 else
1798 {
1799 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
1800
1801 /* NULL if we had an error. */
1802 relocation -= elf_hash_table (info)->tls_sec == NULL
1803 ? 0 : elf_hash_table (info)->tls_sec->vma;
1804 }
1805
1806 outrel.r_offset = (sgot->output_section->vma
1807 + sgot->output_offset
1808 + off);
1809 outrel.r_addend = relocation;
1810 loc = srelgot->contents;
1811 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1812
1813 /* NULL if we had an error. */
1814 if (srelgot->contents != NULL)
1815 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1816 }
1817 else
1818 off &= ~3;
1819
1820 relocation = sgot->output_offset + off
1821 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1822 }
1823
1824 /* The GOT-relative offset to the GOT entry is the
1825 relocation, or for R_CRIS_32_GD, the actual address of
1826 the GOT entry. */
1827 break;
1828
1829 case R_CRIS_32_GOT_TPREL:
1830 case R_CRIS_16_GOT_TPREL:
1831 if (rel->r_addend != 0)
1832 {
1833 /* We can't do anything for a relocation which is
1834 against a symbol *plus offset*. GOT holds
1835 relocations for symbols. Make this an error; the
1836 compiler isn't allowed to pass us these kinds of
1837 things. */
1838 (*_bfd_error_handler)
1839 (_("%B, section %A: relocation %s with non-zero addend %d"
1840 " against symbol `%s'"),
1841 input_bfd,
1842 input_section,
1843 cris_elf_howto_table[r_type].name,
1844 rel->r_addend,
1845 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1846 bfd_set_error (bfd_error_bad_value);
1847 return FALSE;
1848 }
1849
1850 if (!info->shared && (h == NULL || h->def_regular))
1851 {
1852 /* Known contents of the GOT. */
1853 bfd_vma off;
1854
1855 /* The symbol is defined in the program, so just write
1856 the known_tpoffset into the GOT. */
1857 relocation -= elf_hash_table (info)->tls_sec->vma;
1858
1859 if (h != NULL)
1860 off = h->got.offset;
1861 else
1862 off = local_got_offsets[r_symndx];
1863
1864 /* Bit 0 is used to mark whether we've emitted the required
1865 entry (and if needed R_CRIS_32_TPREL reloc). Bit 1
1866 is used similarly for R_CRIS_DTP, see above. */
1867 if ((off & 1) == 0)
1868 {
1869 off &= ~3;
1870
1871 if (h != NULL)
1872 h->got.offset |= 1;
1873 else
1874 local_got_offsets[r_symndx] |= 1;
1875
1876 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1877 }
1878 else
1879 off &= ~3;
1880
1881 relocation = sgot->output_offset + off;
1882 }
1883 else
1884 {
1885 /* Emit a real relocation. */
1886 bfd_vma off;
1887
1888 if (h != NULL)
1889 off = h->got.offset;
1890 else
1891 off = local_got_offsets[r_symndx];
1892
1893 /* See above re usage of bit 0 and 1. */
1894 if ((off & 1) == 0)
1895 {
1896 Elf_Internal_Rela outrel;
1897 bfd_byte *loc;
1898
1899 off &= ~3;
1900
1901 if (h != NULL)
1902 h->got.offset |= 1;
1903 else
1904 local_got_offsets[r_symndx] |= 1;
1905
1906 if (srelgot == NULL)
1907 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1908 BFD_ASSERT (srelgot != NULL);
1909
1910 if (h != NULL && h->dynindx != -1)
1911 {
1912 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
1913 relocation = 0;
1914 }
1915 else
1916 {
1917 outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
1918
1919 /* NULL if we had an error. */
1920 relocation -= elf_hash_table (info)->tls_sec == NULL
1921 ? 0 : elf_hash_table (info)->tls_sec->vma;
1922 }
1923
1924 /* Just "define" the initial contents in some
1925 semi-logical way. */
1926 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1927
1928 outrel.r_offset = (sgot->output_section->vma
1929 + sgot->output_offset
1930 + off);
1931 outrel.r_addend = relocation;
1932 loc = srelgot->contents;
1933 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1934 /* NULL if we had an error. */
1935 if (srelgot->contents != NULL)
1936 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1937 }
1938 else
1939 off &= ~3;
1940
1941 relocation = sgot->output_offset + off;
1942 }
1943
1944 /* The GOT-relative offset to the GOT entry is the relocation. */
1945 break;
1946
1947 case R_CRIS_16_TPREL:
1948 case R_CRIS_32_TPREL:
1949 /* This relocation must only be performed against symbols
1950 defined in an ordinary (non-DSO) object. */
1951 if (info->shared)
1952 {
1953 bfd_set_error (bfd_error_invalid_operation);
1954
1955 /* We've already informed in cris_elf_check_relocs that
1956 this is an error. */
1957 return FALSE;
1958 }
1959
1960 if (h != NULL
1961 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1962 && !h->def_regular
1963 /* If it's undefined, then an error message has already
1964 been emitted. */
1965 && h->root.type != bfd_link_hash_undefined)
1966 {
1967 (*_bfd_error_handler)
1968 (_("%B, section %A: relocation %s is"
1969 " not allowed for symbol: `%s'"
1970 " which is defined outside the program,"
1971 " perhaps a declaration mixup?"),
1972 input_bfd,
1973 input_section,
1974 cris_elf_howto_table[r_type].name,
1975 symname);
1976 bfd_set_error (bfd_error_bad_value);
1977 return FALSE;
1978 }
1979
1980 /* NULL if we had an error. */
1981 relocation -= elf_hash_table (info)->tls_sec == NULL
1982 ? 0 : elf_hash_table (info)->tls_sec->vma;
1983
1984 /* The TLS-relative offset is the relocation. */
1985 break;
1986
1987 default:
1988 BFD_FAIL ();
1989 return FALSE;
1990 }
1991
1992 r = cris_final_link_relocate (howto, input_bfd, input_section,
1993 contents, rel, relocation);
1994
1995 if (r != bfd_reloc_ok)
1996 {
1997 const char * msg = (const char *) NULL;
1998
1999 switch (r)
2000 {
2001 case bfd_reloc_overflow:
2002 r = info->callbacks->reloc_overflow
2003 (info, (h ? &h->root : NULL), symname, howto->name,
2004 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
2005 if (additional_relocation_error_msg_count > 0)
2006 {
2007 additional_relocation_error_msg_count--;
2008 switch (r_type)
2009 {
2010 case R_CRIS_16_GOTPLT:
2011 case R_CRIS_16_GOT:
2012
2013 /* Not just TLS is involved here, so we make
2014 generation and message depend on -fPIC/-fpic
2015 only. */
2016 case R_CRIS_16_GOT_TPREL:
2017 case R_CRIS_16_GOT_GD:
2018 (*_bfd_error_handler)
2019 (_("(too many global variables for -fpic:"
2020 " recompile with -fPIC)"));
2021 break;
2022
2023 case R_CRIS_16_TPREL:
2024 case R_CRIS_16_DTPREL:
2025 (*_bfd_error_handler)
2026 (_("(thread-local data too big for -fpic or"
2027 " -msmall-tls: recompile with -fPIC or"
2028 " -mno-small-tls)"));
2029 break;
2030
2031 /* No known cause for overflow for other relocs. */
2032 default:
2033 break;
2034 }
2035 }
2036 break;
2037
2038 case bfd_reloc_undefined:
2039 r = info->callbacks->undefined_symbol
2040 (info, symname, input_bfd, input_section, rel->r_offset,
2041 TRUE);
2042 break;
2043
2044 case bfd_reloc_outofrange:
2045 msg = _("internal error: out of range error");
2046 break;
2047
2048 case bfd_reloc_notsupported:
2049 msg = _("internal error: unsupported relocation error");
2050 break;
2051
2052 case bfd_reloc_dangerous:
2053 msg = _("internal error: dangerous relocation");
2054 break;
2055
2056 default:
2057 msg = _("internal error: unknown error");
2058 break;
2059 }
2060
2061 if (msg)
2062 r = info->callbacks->warning
2063 (info, msg, symname, input_bfd, input_section, rel->r_offset);
2064
2065 if (! r)
2066 return FALSE;
2067 }
2068 }
2069
2070 return TRUE;
2071 }
2072 \f
2073 /* Finish up dynamic symbol handling. We set the contents of various
2074 dynamic sections here. */
2075
2076 static bfd_boolean
2077 elf_cris_finish_dynamic_symbol (output_bfd, info, h, sym)
2078 bfd *output_bfd;
2079 struct bfd_link_info *info;
2080 struct elf_link_hash_entry *h;
2081 Elf_Internal_Sym *sym;
2082 {
2083 bfd *dynobj;
2084
2085 /* Where in the plt entry to put values. */
2086 int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
2087
2088 /* What offset to add to the distance to the first PLT entry for the
2089 value at plt_off3. */
2090 int plt_off3_value_bias = 4;
2091
2092 /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2093 for PIC and non-PIC for v32 and pre-v32). */
2094 int plt_stub_offset = 8;
2095 int plt_entry_size = PLT_ENTRY_SIZE;
2096 const bfd_byte *plt_entry = elf_cris_plt_entry;
2097 const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
2098
2099 /* Adjust the various PLT entry offsets. */
2100 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2101 {
2102 plt_off2 = 14;
2103 plt_off3 = 20;
2104 plt_off3_value_bias = -2;
2105 plt_stub_offset = 12;
2106 plt_entry_size = PLT_ENTRY_SIZE_V32;
2107 plt_entry = elf_cris_plt_entry_v32;
2108 plt_pic_entry = elf_cris_pic_plt_entry_v32;
2109 }
2110
2111 dynobj = elf_hash_table (info)->dynobj;
2112
2113 if (h->plt.offset != (bfd_vma) -1)
2114 {
2115 asection *splt;
2116 asection *sgotplt;
2117 asection *sgot;
2118 asection *srela;
2119 bfd_vma got_base;
2120
2121 bfd_vma gotplt_offset
2122 = elf_cris_hash_entry (h)->gotplt_offset;
2123 Elf_Internal_Rela rela;
2124 bfd_byte *loc;
2125 bfd_boolean has_gotplt = gotplt_offset != 0;
2126
2127 /* Get the index in the procedure linkage table which
2128 corresponds to this symbol. This is the index of this symbol
2129 in all the symbols for which we are making plt entries. The
2130 first entry in the procedure linkage table is reserved. */
2131 /* We have to count backwards here, and the result is only valid as
2132 an index into .got.plt and its relocations. FIXME: Constants... */
2133 bfd_vma gotplt_index = gotplt_offset/4 - 3;
2134
2135 /* Get the offset into the .got table of the entry that corresponds
2136 to this function. Note that we embed knowledge that "incoming"
2137 .got goes after .got.plt in the output without padding (pointer
2138 aligned). However, that knowledge is present in several other
2139 places too. */
2140 bfd_vma got_offset
2141 = (has_gotplt
2142 ? gotplt_offset
2143 : h->got.offset + elf_cris_hash_table(info)->next_gotplt_entry);
2144
2145 /* This symbol has an entry in the procedure linkage table. Set it
2146 up. */
2147
2148 BFD_ASSERT (h->dynindx != -1);
2149
2150 splt = bfd_get_section_by_name (dynobj, ".plt");
2151 sgot = bfd_get_section_by_name (dynobj, ".got");
2152 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
2153 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
2154 BFD_ASSERT (splt != NULL && sgotplt != NULL
2155 && (! has_gotplt || srela != NULL));
2156
2157 got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2158
2159 /* Fill in the entry in the procedure linkage table. */
2160 if (! info->shared)
2161 {
2162 memcpy (splt->contents + h->plt.offset, plt_entry,
2163 plt_entry_size);
2164
2165 /* We need to enter the absolute address of the GOT entry here. */
2166 bfd_put_32 (output_bfd, got_base + got_offset,
2167 splt->contents + h->plt.offset + plt_off1);
2168 }
2169 else
2170 {
2171 memcpy (splt->contents + h->plt.offset, plt_pic_entry,
2172 plt_entry_size);
2173 bfd_put_32 (output_bfd, got_offset,
2174 splt->contents + h->plt.offset + plt_off1);
2175 }
2176
2177 /* Fill in the plt entry and make a relocation, if this is a "real"
2178 PLT entry. */
2179 if (has_gotplt)
2180 {
2181 /* Fill in the offset to the reloc table. */
2182 bfd_put_32 (output_bfd,
2183 gotplt_index * sizeof (Elf32_External_Rela),
2184 splt->contents + h->plt.offset + plt_off2);
2185
2186 /* Fill in the offset to the first PLT entry, where to "jump". */
2187 bfd_put_32 (output_bfd,
2188 - (h->plt.offset + plt_off3 + plt_off3_value_bias),
2189 splt->contents + h->plt.offset + plt_off3);
2190
2191 /* Fill in the entry in the global offset table with the address of
2192 the relocating stub. */
2193 bfd_put_32 (output_bfd,
2194 (splt->output_section->vma
2195 + splt->output_offset
2196 + h->plt.offset
2197 + plt_stub_offset),
2198 sgotplt->contents + got_offset);
2199
2200 /* Fill in the entry in the .rela.plt section. */
2201 rela.r_offset = (sgotplt->output_section->vma
2202 + sgotplt->output_offset
2203 + got_offset);
2204 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
2205 rela.r_addend = 0;
2206 loc = srela->contents + gotplt_index * sizeof (Elf32_External_Rela);
2207 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2208 }
2209
2210 if (!h->def_regular)
2211 {
2212 /* Mark the symbol as undefined, rather than as defined in
2213 the .plt section. Leave the value alone. */
2214 sym->st_shndx = SHN_UNDEF;
2215
2216 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
2217 know whether resetting the value is significant; if it really
2218 is, rather than a quirk or bug in the sparc port, then I
2219 believe we'd see this elsewhere. */
2220 /* If the symbol is weak, we do need to clear the value.
2221 Otherwise, the PLT entry would provide a definition for
2222 the symbol even if the symbol wasn't defined anywhere,
2223 and so the symbol would never be NULL. */
2224 if (!h->ref_regular_nonweak)
2225 sym->st_value = 0;
2226 }
2227 }
2228
2229 /* For an ordinary program, we emit .got relocs only for symbols that
2230 are in the dynamic-symbols table and are either defined by the
2231 program or are undefined weak symbols, or are function symbols
2232 where we do not output a PLT: the PLT reloc was output above and all
2233 references to the function symbol are redirected to the PLT. */
2234 if (h->got.offset != (bfd_vma) -1
2235 && (elf_cris_hash_entry (h)->reg_got_refcount > 0)
2236 && (info->shared
2237 || (h->dynindx != -1
2238 && h->plt.offset == (bfd_vma) -1
2239 && !h->def_regular
2240 && h->root.type != bfd_link_hash_undefweak)))
2241 {
2242 asection *sgot;
2243 asection *srela;
2244 Elf_Internal_Rela rela;
2245 bfd_byte *loc;
2246 bfd_byte *where;
2247
2248 /* This symbol has an entry in the global offset table. Set it up. */
2249
2250 sgot = bfd_get_section_by_name (dynobj, ".got");
2251 srela = bfd_get_section_by_name (dynobj, ".rela.got");
2252 BFD_ASSERT (sgot != NULL && srela != NULL);
2253
2254 rela.r_offset = (sgot->output_section->vma
2255 + sgot->output_offset
2256 + (h->got.offset &~ (bfd_vma) 1));
2257
2258 /* If this is a static link, or it is a -Bsymbolic link and the
2259 symbol is defined locally or was forced to be local because
2260 of a version file, we just want to emit a RELATIVE reloc.
2261 The entry in the global offset table will already have been
2262 initialized in the relocate_section function. */
2263 where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
2264 if (! elf_hash_table (info)->dynamic_sections_created
2265 || (info->shared
2266 && (info->symbolic || h->dynindx == -1)
2267 && h->def_regular))
2268 {
2269 rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
2270 rela.r_addend = bfd_get_signed_32 (output_bfd, where);
2271 }
2272 else
2273 {
2274 bfd_put_32 (output_bfd, (bfd_vma) 0, where);
2275 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
2276 rela.r_addend = 0;
2277 }
2278
2279 loc = srela->contents;
2280 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2281 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2282 }
2283
2284 if (h->needs_copy)
2285 {
2286 asection *s;
2287 Elf_Internal_Rela rela;
2288 bfd_byte *loc;
2289
2290 /* This symbol needs a copy reloc. Set it up. */
2291
2292 BFD_ASSERT (h->dynindx != -1
2293 && (h->root.type == bfd_link_hash_defined
2294 || h->root.type == bfd_link_hash_defweak));
2295
2296 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2297 ".rela.bss");
2298 BFD_ASSERT (s != NULL);
2299
2300 rela.r_offset = (h->root.u.def.value
2301 + h->root.u.def.section->output_section->vma
2302 + h->root.u.def.section->output_offset);
2303 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
2304 rela.r_addend = 0;
2305 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2306 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2307 }
2308
2309 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2310 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2311 || h == elf_hash_table (info)->hgot)
2312 sym->st_shndx = SHN_ABS;
2313
2314 return TRUE;
2315 }
2316 \f
2317 /* Finish up the dynamic sections. Do *not* emit relocs here, as their
2318 offsets were changed, as part of -z combreloc handling, from those we
2319 computed. */
2320
2321 static bfd_boolean
2322 elf_cris_finish_dynamic_sections (output_bfd, info)
2323 bfd *output_bfd;
2324 struct bfd_link_info *info;
2325 {
2326 bfd *dynobj;
2327 asection *sgot;
2328 asection *sdyn;
2329
2330 dynobj = elf_hash_table (info)->dynobj;
2331
2332 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
2333 BFD_ASSERT (sgot != NULL);
2334 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2335
2336 if (elf_hash_table (info)->dynamic_sections_created)
2337 {
2338 asection *splt;
2339 Elf32_External_Dyn *dyncon, *dynconend;
2340
2341 splt = bfd_get_section_by_name (dynobj, ".plt");
2342 BFD_ASSERT (splt != NULL && sdyn != NULL);
2343
2344 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2345 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2346 for (; dyncon < dynconend; dyncon++)
2347 {
2348 Elf_Internal_Dyn dyn;
2349 asection *s;
2350
2351 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2352
2353 switch (dyn.d_tag)
2354 {
2355 default:
2356 break;
2357
2358 case DT_PLTGOT:
2359 s = bfd_get_section_by_name (output_bfd, ".got");
2360 BFD_ASSERT (s != NULL);
2361 dyn.d_un.d_ptr = s->vma;
2362 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2363 break;
2364
2365 case DT_JMPREL:
2366 /* Yes, we *can* have a .plt and no .plt.rela, for instance
2367 if all symbols are found in the .got (not .got.plt). */
2368 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2369 dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
2370 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2371 break;
2372
2373 case DT_PLTRELSZ:
2374 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2375 if (s == NULL)
2376 dyn.d_un.d_val = 0;
2377 else
2378 dyn.d_un.d_val = s->size;
2379 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2380 break;
2381
2382 case DT_RELASZ:
2383 /* The procedure linkage table relocs (DT_JMPREL) should
2384 not be included in the overall relocs (DT_RELA).
2385 Therefore, we override the DT_RELASZ entry here to
2386 make it not include the JMPREL relocs. Since the
2387 linker script arranges for .rela.plt to follow all
2388 other relocation sections, we don't have to worry
2389 about changing the DT_RELA entry. */
2390 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2391 if (s != NULL)
2392 dyn.d_un.d_val -= s->size;
2393 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2394 break;
2395 }
2396 }
2397
2398 /* Fill in the first entry in the procedure linkage table. */
2399 if (splt->size > 0)
2400 {
2401 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2402 {
2403 if (info->shared)
2404 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
2405 PLT_ENTRY_SIZE_V32);
2406 else
2407 {
2408 memcpy (splt->contents, elf_cris_plt0_entry_v32,
2409 PLT_ENTRY_SIZE_V32);
2410 bfd_put_32 (output_bfd,
2411 sgot->output_section->vma
2412 + sgot->output_offset + 4,
2413 splt->contents + 4);
2414
2415 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2416 = PLT_ENTRY_SIZE_V32;
2417 }
2418 }
2419 else
2420 {
2421 if (info->shared)
2422 memcpy (splt->contents, elf_cris_pic_plt0_entry,
2423 PLT_ENTRY_SIZE);
2424 else
2425 {
2426 memcpy (splt->contents, elf_cris_plt0_entry,
2427 PLT_ENTRY_SIZE);
2428 bfd_put_32 (output_bfd,
2429 sgot->output_section->vma
2430 + sgot->output_offset + 4,
2431 splt->contents + 6);
2432 bfd_put_32 (output_bfd,
2433 sgot->output_section->vma
2434 + sgot->output_offset + 8,
2435 splt->contents + 14);
2436
2437 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2438 = PLT_ENTRY_SIZE;
2439 }
2440 }
2441 }
2442 }
2443
2444 /* Fill in the first three entries in the global offset table. */
2445 if (sgot->size > 0)
2446 {
2447 if (sdyn == NULL)
2448 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2449 else
2450 bfd_put_32 (output_bfd,
2451 sdyn->output_section->vma + sdyn->output_offset,
2452 sgot->contents);
2453 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2454 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2455 }
2456
2457 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2458
2459 return TRUE;
2460 }
2461 \f
2462 /* Return the section that should be marked against GC for a given
2463 relocation. */
2464
2465 static asection *
2466 cris_elf_gc_mark_hook (asection *sec,
2467 struct bfd_link_info *info,
2468 Elf_Internal_Rela *rel,
2469 struct elf_link_hash_entry *h,
2470 Elf_Internal_Sym *sym)
2471 {
2472 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
2473 if (h != NULL)
2474 switch (r_type)
2475 {
2476 case R_CRIS_GNU_VTINHERIT:
2477 case R_CRIS_GNU_VTENTRY:
2478 return NULL;
2479
2480 default:
2481 break;
2482 }
2483
2484 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2485 }
2486
2487 /* Update the got entry reference counts for the section being removed. */
2488
2489 static bfd_boolean
2490 cris_elf_gc_sweep_hook (bfd *abfd,
2491 struct bfd_link_info *info,
2492 asection *sec,
2493 const Elf_Internal_Rela *relocs)
2494 {
2495 Elf_Internal_Shdr *symtab_hdr;
2496 struct elf_link_hash_entry **sym_hashes;
2497 bfd_signed_vma *local_got_refcounts;
2498 const Elf_Internal_Rela *rel, *relend;
2499 bfd *dynobj;
2500 asection *sgot;
2501 asection *srelgot;
2502
2503 if (info->relocatable)
2504 return TRUE;
2505
2506 dynobj = elf_hash_table (info)->dynobj;
2507 if (dynobj == NULL)
2508 return TRUE;
2509
2510 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2511 sym_hashes = elf_sym_hashes (abfd);
2512 local_got_refcounts = elf_local_got_refcounts (abfd);
2513
2514 sgot = bfd_get_section_by_name (dynobj, ".got");
2515 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2516
2517 relend = relocs + sec->reloc_count;
2518 for (rel = relocs; rel < relend; rel++)
2519 {
2520 unsigned long r_symndx;
2521 struct elf_link_hash_entry *h = NULL;
2522 bfd_signed_vma got_element_size = 4;
2523 bfd_signed_vma *specific_refcount = NULL;
2524 enum elf_cris_reloc_type r_type;
2525
2526 r_symndx = ELF32_R_SYM (rel->r_info);
2527 if (r_symndx >= symtab_hdr->sh_info)
2528 {
2529 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2530 while (h->root.type == bfd_link_hash_indirect
2531 || h->root.type == bfd_link_hash_warning)
2532 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2533 }
2534
2535 r_type = ELF32_R_TYPE (rel->r_info);
2536 switch (r_type)
2537 {
2538 case R_CRIS_32_GOT:
2539 case R_CRIS_16_GOT:
2540 case R_CRIS_16_GOTPLT:
2541 case R_CRIS_32_GOTPLT:
2542 specific_refcount = h != NULL
2543 ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount
2544 : &local_got_refcounts[LGOT_REG_NDX (r_symndx)];
2545 break;
2546
2547 case R_CRIS_32_GD:
2548 case R_CRIS_32_GOT_GD:
2549 case R_CRIS_16_GOT_GD:
2550 got_element_size = 8;
2551 specific_refcount = h != NULL
2552 ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount
2553 : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)];
2554 break;
2555
2556 case R_CRIS_16_GOT_TPREL:
2557 case R_CRIS_32_GOT_TPREL:
2558 specific_refcount = h != NULL
2559 ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount
2560 : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)];
2561 break;
2562
2563 default:
2564 break;
2565 }
2566
2567 switch (r_type)
2568 {
2569 case R_CRIS_32_GD:
2570 case R_CRIS_16_GOT_TPREL:
2571 case R_CRIS_32_GOT_TPREL:
2572 case R_CRIS_32_GOT_GD:
2573 case R_CRIS_16_GOT_GD:
2574 case R_CRIS_16_GOT:
2575 case R_CRIS_32_GOT:
2576 if (h != NULL)
2577 {
2578 /* If the counters are 0 when we got here, we've
2579 miscounted somehow somewhere, an internal error. */
2580 BFD_ASSERT (h->got.refcount > 0);
2581 --h->got.refcount;
2582
2583 BFD_ASSERT (*specific_refcount > 0);
2584 --*specific_refcount;
2585 if (*specific_refcount == 0)
2586 {
2587 /* We don't need the .got entry any more. */
2588 sgot->size -= got_element_size;
2589 srelgot->size -= sizeof (Elf32_External_Rela);
2590 }
2591 break;
2592 }
2593
2594 local_got_reloc:
2595 if (local_got_refcounts != NULL)
2596 {
2597 /* If the counters are 0 when we got here, we've
2598 miscounted somehow somewhere, an internal error. */
2599 BFD_ASSERT (local_got_refcounts[r_symndx] > 0);
2600 --local_got_refcounts[r_symndx];
2601
2602 BFD_ASSERT (*specific_refcount > 0);
2603 --*specific_refcount;
2604 if (*specific_refcount == 0)
2605 {
2606 /* We don't need the .got entry any more. */
2607 sgot->size -= got_element_size;
2608 if (info->shared)
2609 srelgot->size -= sizeof (Elf32_External_Rela);
2610 }
2611 }
2612 break;
2613
2614 case R_CRIS_16_GOTPLT:
2615 case R_CRIS_32_GOTPLT:
2616 /* For local symbols, treat these like GOT relocs. */
2617 if (h == NULL)
2618 goto local_got_reloc;
2619 /* Fall through. */
2620
2621 case R_CRIS_32_PLT_GOTREL:
2622 /* FIXME: We don't garbage-collect away the .got section. */
2623 if (local_got_refcounts != NULL)
2624 local_got_refcounts[-1]--;
2625 /* Fall through. */
2626
2627 case R_CRIS_8_PCREL:
2628 case R_CRIS_16_PCREL:
2629 case R_CRIS_32_PCREL:
2630 case R_CRIS_32_PLT_PCREL:
2631 if (h != NULL)
2632 {
2633 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2634 && h->plt.refcount > 0)
2635 --h->plt.refcount;
2636 }
2637 break;
2638
2639 case R_CRIS_32_DTPREL:
2640 case R_CRIS_16_DTPREL:
2641 elf_cris_hash_table (info)->dtpmod_refcount--;
2642 if (elf_cris_hash_table (info)->dtpmod_refcount == 0)
2643 elf_cris_hash_table (info)->next_gotplt_entry -= 8;
2644 BFD_ASSERT (local_got_refcounts != NULL);
2645 local_got_refcounts[-1]--;
2646 break;
2647
2648 default:
2649 break;
2650 }
2651 }
2652
2653 return TRUE;
2654 }
2655
2656 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2657 entry but we found we will not create any. Called when we find we will
2658 not have any PLT for this symbol, by for example
2659 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2660 or elf_cris_size_dynamic_sections if no dynamic sections will be
2661 created (we're only linking static objects). */
2662
2663 static bfd_boolean
2664 elf_cris_adjust_gotplt_to_got (h, p)
2665 struct elf_cris_link_hash_entry *h;
2666 PTR p;
2667 {
2668 struct bfd_link_info *info = (struct bfd_link_info *) p;
2669
2670 if (h->root.root.type == bfd_link_hash_warning)
2671 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
2672
2673 /* If nobody wanted a GOTPLT with this symbol, we're done. */
2674 if (h->gotplt_refcount <= 0)
2675 return TRUE;
2676
2677 if (h->reg_got_refcount > 0)
2678 {
2679 /* There's a GOT entry for this symbol. Just adjust the refcounts.
2680 Probably not necessary at this stage, but keeping them accurate
2681 helps avoiding surprises later. */
2682 h->root.got.refcount += h->gotplt_refcount;
2683 h->reg_got_refcount += h->gotplt_refcount;
2684 h->gotplt_refcount = 0;
2685 }
2686 else
2687 {
2688 /* No GOT entry for this symbol. We need to create one. */
2689 bfd *dynobj = elf_hash_table (info)->dynobj;
2690 asection *sgot;
2691 asection *srelgot;
2692
2693 BFD_ASSERT (dynobj != NULL);
2694 sgot = bfd_get_section_by_name (dynobj, ".got");
2695 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2696
2697 /* Put accurate refcounts there. */
2698 h->root.got.refcount += h->gotplt_refcount;
2699 h->reg_got_refcount = h->gotplt_refcount;
2700
2701 h->gotplt_refcount = 0;
2702
2703 /* We always have a .got and a .rela.got section if there were
2704 GOTPLT relocs in input. */
2705 BFD_ASSERT (sgot != NULL && srelgot != NULL);
2706
2707 /* Allocate space in the .got section. */
2708 sgot->size += 4;
2709
2710 /* Allocate relocation space. */
2711 srelgot->size += sizeof (Elf32_External_Rela);
2712 }
2713
2714 return TRUE;
2715 }
2716
2717 /* Try to fold PLT entries with GOT entries. There are two cases when we
2718 want to do this:
2719
2720 - When all PLT references are GOTPLT references, and there are GOT
2721 references, and this is not the executable. We don't have to
2722 generate a PLT at all.
2723
2724 - When there are both (ordinary) PLT references and GOT references,
2725 and this isn't the executable.
2726 We want to make the PLT reference use the ordinary GOT entry rather
2727 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2728 since the GOT entry will have to be resolved at startup anyway.
2729
2730 Though the latter case is handled when room for the PLT is allocated,
2731 not here.
2732
2733 By folding into the GOT, we may need a round-trip to a PLT in the
2734 executable for calls, a loss in performance. Still, losing a
2735 reloc is a win in size and at least in start-up time.
2736
2737 Note that this function is called before symbols are forced local by
2738 version scripts. The differing cases are handled by
2739 elf_cris_hide_symbol. */
2740
2741 static bfd_boolean
2742 elf_cris_try_fold_plt_to_got (h, p)
2743 struct elf_cris_link_hash_entry *h;
2744 PTR p;
2745 {
2746 struct bfd_link_info *info = (struct bfd_link_info *) p;
2747
2748 /* If there are no GOT references for this symbol, we can't fold any
2749 other reference so there's nothing to do. Likewise if there are no
2750 PLT references; GOTPLT references included. */
2751 if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2752 return TRUE;
2753
2754 /* GOTPLT relocs are supposed to be included into the PLT refcount. */
2755 BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2756
2757 if (h->gotplt_refcount == h->root.plt.refcount)
2758 {
2759 /* The only PLT references are GOTPLT references, and there are GOT
2760 references. Convert PLT to GOT references. */
2761 if (! elf_cris_adjust_gotplt_to_got (h, info))
2762 return FALSE;
2763
2764 /* Clear the PLT references, so no PLT will be created. */
2765 h->root.plt.offset = (bfd_vma) -1;
2766 }
2767
2768 return TRUE;
2769 }
2770
2771 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2772 to use a GOT entry (and create one) rather than requiring a GOTPLT
2773 entry. */
2774
2775 static void
2776 elf_cris_hide_symbol (info, h, force_local)
2777 struct bfd_link_info *info;
2778 struct elf_link_hash_entry *h;
2779 bfd_boolean force_local;
2780 {
2781 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2782
2783 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2784 }
2785
2786 /* Adjust a symbol defined by a dynamic object and referenced by a
2787 regular object. The current definition is in some section of the
2788 dynamic object, but we're not including those sections. We have to
2789 change the definition to something the rest of the link can
2790 understand. */
2791
2792 static bfd_boolean
2793 elf_cris_adjust_dynamic_symbol (info, h)
2794 struct bfd_link_info *info;
2795 struct elf_link_hash_entry *h;
2796 {
2797 bfd *dynobj;
2798 asection *s;
2799 bfd_size_type plt_entry_size;
2800
2801 dynobj = elf_hash_table (info)->dynobj;
2802
2803 /* Make sure we know what is going on here. */
2804 BFD_ASSERT (dynobj != NULL
2805 && (h->needs_plt
2806 || h->u.weakdef != NULL
2807 || (h->def_dynamic
2808 && h->ref_regular
2809 && !h->def_regular)));
2810
2811 plt_entry_size
2812 = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2813 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2814
2815 /* If this is a function, put it in the procedure linkage table. We
2816 will fill in the contents of the procedure linkage table later,
2817 when we know the address of the .got section. */
2818 if (h->type == STT_FUNC
2819 || h->needs_plt)
2820 {
2821 /* If we link a program (not a DSO), we'll get rid of unnecessary
2822 PLT entries; we point to the actual symbols -- even for pic
2823 relocs, because a program built with -fpic should have the same
2824 result as one built without -fpic, specifically considering weak
2825 symbols.
2826 FIXME: m68k and i386 differ here, for unclear reasons. */
2827 if (! info->shared
2828 && !h->def_dynamic)
2829 {
2830 /* This case can occur if we saw a PLT reloc in an input file,
2831 but the symbol was not defined by a dynamic object. In such
2832 a case, we don't actually need to build a procedure linkage
2833 table, and we can just do an absolute or PC reloc instead, or
2834 change a .got.plt index to a .got index for GOTPLT relocs. */
2835 BFD_ASSERT (h->needs_plt);
2836 h->needs_plt = 0;
2837 h->plt.offset = (bfd_vma) -1;
2838 return
2839 elf_cris_adjust_gotplt_to_got ((struct
2840 elf_cris_link_hash_entry *) h,
2841 info);
2842 }
2843
2844 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2845 where a pointer-equivalent symbol was unimportant (i.e. more
2846 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2847 of the PLT. We can't for the executable, because the GOT
2848 entries will point to the PLT there (and be constant). */
2849 if (info->shared
2850 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2851 h, info))
2852 return FALSE;
2853
2854 /* GC or folding may have rendered this entry unused. */
2855 if (h->plt.refcount <= 0)
2856 {
2857 h->needs_plt = 0;
2858 h->plt.offset = (bfd_vma) -1;
2859 return TRUE;
2860 }
2861
2862 /* Make sure this symbol is output as a dynamic symbol. */
2863 if (h->dynindx == -1)
2864 {
2865 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2866 return FALSE;
2867 }
2868
2869 s = bfd_get_section_by_name (dynobj, ".plt");
2870 BFD_ASSERT (s != NULL);
2871
2872 /* If this is the first .plt entry, make room for the special
2873 first entry. */
2874 if (s->size == 0)
2875 s->size += plt_entry_size;
2876
2877 /* If this symbol is not defined in a regular file, and we are
2878 not generating a shared library, then set the symbol to this
2879 location in the .plt. */
2880 if (!info->shared
2881 && !h->def_regular)
2882 {
2883 h->root.u.def.section = s;
2884 h->root.u.def.value = s->size;
2885 }
2886
2887 /* If there's already a GOT entry, use that, not a .got.plt. A
2888 GOT field still has a reference count when we get here; it's
2889 not yet changed to an offset. We can't do this for an
2890 executable, because then the reloc associated with the PLT
2891 would get a non-PLT reloc pointing to the PLT. FIXME: Move
2892 this to elf_cris_try_fold_plt_to_got. */
2893 if (info->shared && h->got.refcount > 0)
2894 {
2895 h->got.refcount += h->plt.refcount;
2896
2897 /* Mark the PLT offset to use the GOT entry by setting the low
2898 bit in the plt offset; it is always a multiple of
2899 plt_entry_size (which is at least a multiple of 2). */
2900 BFD_ASSERT ((s->size % plt_entry_size) == 0);
2901
2902 /* Change the PLT refcount to an offset. */
2903 h->plt.offset = s->size;
2904
2905 /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2906 that the got entry should be used instead. */
2907 BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2908 h)->gotplt_offset == 0);
2909
2910 /* Make room for this entry. */
2911 s->size += plt_entry_size;
2912
2913 return TRUE;
2914 }
2915
2916 /* No GOT reference for this symbol; prepare for an ordinary PLT. */
2917 h->plt.offset = s->size;
2918
2919 /* Make room for this entry. */
2920 s->size += plt_entry_size;
2921
2922 /* We also need to make an entry in the .got.plt section, which
2923 will be placed in the .got section by the linker script. */
2924 ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2925 = elf_cris_hash_table (info)->next_gotplt_entry;
2926 elf_cris_hash_table (info)->next_gotplt_entry += 4;
2927
2928 s = bfd_get_section_by_name (dynobj, ".got.plt");
2929 BFD_ASSERT (s != NULL);
2930 s->size += 4;
2931
2932 /* We also need to make an entry in the .rela.plt section. */
2933
2934 s = bfd_get_section_by_name (dynobj, ".rela.plt");
2935 BFD_ASSERT (s != NULL);
2936 s->size += sizeof (Elf32_External_Rela);
2937
2938 return TRUE;
2939 }
2940
2941 /* Reinitialize the plt offset now that it is not used as a reference
2942 count any more. */
2943 h->plt.offset = (bfd_vma) -1;
2944
2945 /* If this is a weak symbol, and there is a real definition, the
2946 processor independent code will have arranged for us to see the
2947 real definition first, and we can just use the same value. */
2948 if (h->u.weakdef != NULL)
2949 {
2950 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2951 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2952 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2953 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2954 return TRUE;
2955 }
2956
2957 /* This is a reference to a symbol defined by a dynamic object which
2958 is not a function. */
2959
2960 /* If we are creating a shared library, we must presume that the
2961 only references to the symbol are via the global offset table.
2962 For such cases we need not do anything here; the relocations will
2963 be handled correctly by relocate_section. */
2964 if (info->shared)
2965 return TRUE;
2966
2967 /* If there are no references to this symbol that do not use the
2968 GOT, we don't need to generate a copy reloc. */
2969 if (!h->non_got_ref)
2970 return TRUE;
2971
2972 if (h->size == 0)
2973 {
2974 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
2975 h->root.root.string);
2976 return TRUE;
2977 }
2978
2979 /* We must allocate the symbol in our .dynbss section, which will
2980 become part of the .bss section of the executable. There will be
2981 an entry for this symbol in the .dynsym section. The dynamic
2982 object will contain position independent code, so all references
2983 from the dynamic object to this symbol will go through the global
2984 offset table. The dynamic linker will use the .dynsym entry to
2985 determine the address it must put in the global offset table, so
2986 both the dynamic object and the regular object will refer to the
2987 same memory location for the variable. */
2988
2989 s = bfd_get_section_by_name (dynobj, ".dynbss");
2990 BFD_ASSERT (s != NULL);
2991
2992 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
2993 copy the initial value out of the dynamic object and into the
2994 runtime process image. We need to remember the offset into the
2995 .rela.bss section we are going to use. */
2996 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2997 {
2998 asection *srel;
2999
3000 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
3001 BFD_ASSERT (srel != NULL);
3002 srel->size += sizeof (Elf32_External_Rela);
3003 h->needs_copy = 1;
3004 }
3005
3006 return _bfd_elf_adjust_dynamic_copy (h, s);
3007 }
3008
3009 /* Look through the relocs for a section during the first phase. */
3010
3011 static bfd_boolean
3012 cris_elf_check_relocs (abfd, info, sec, relocs)
3013 bfd *abfd;
3014 struct bfd_link_info *info;
3015 asection *sec;
3016 const Elf_Internal_Rela *relocs;
3017 {
3018 bfd *dynobj;
3019 Elf_Internal_Shdr *symtab_hdr;
3020 struct elf_link_hash_entry **sym_hashes;
3021 bfd_signed_vma *local_got_refcounts;
3022 const Elf_Internal_Rela *rel;
3023 const Elf_Internal_Rela *rel_end;
3024 asection *sgot;
3025 asection *srelgot;
3026 asection *sreloc;
3027
3028 if (info->relocatable)
3029 return TRUE;
3030
3031 dynobj = elf_hash_table (info)->dynobj;
3032 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3033 sym_hashes = elf_sym_hashes (abfd);
3034 local_got_refcounts = elf_local_got_refcounts (abfd);
3035
3036 sgot = NULL;
3037 srelgot = NULL;
3038 sreloc = NULL;
3039
3040 rel_end = relocs + sec->reloc_count;
3041 for (rel = relocs; rel < rel_end; rel++)
3042 {
3043 struct elf_link_hash_entry *h;
3044 unsigned long r_symndx;
3045 enum elf_cris_reloc_type r_type;
3046 bfd_signed_vma got_element_size = 4;
3047 unsigned long r_symndx_lgot = INT_MAX;
3048
3049 r_symndx = ELF32_R_SYM (rel->r_info);
3050 if (r_symndx < symtab_hdr->sh_info)
3051 {
3052 h = NULL;
3053 r_symndx_lgot = LGOT_REG_NDX (r_symndx);
3054 }
3055 else
3056 {
3057 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3058 while (h->root.type == bfd_link_hash_indirect
3059 || h->root.type == bfd_link_hash_warning)
3060 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3061 }
3062
3063 r_type = ELF32_R_TYPE (rel->r_info);
3064
3065 /* Some relocs require linker-created sections; we need to hang them
3066 on the first input bfd we found that contained dynamic relocs. */
3067 switch (r_type)
3068 {
3069 case R_CRIS_16_DTPREL:
3070 case R_CRIS_32_DTPREL:
3071 /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3072 entry at index 3. */
3073 if (elf_cris_hash_table (info)->dtpmod_refcount == 0)
3074 elf_cris_hash_table (info)->next_gotplt_entry += 8;
3075 elf_cris_hash_table (info)->dtpmod_refcount++;
3076 /* Fall through. */
3077
3078 case R_CRIS_32_GD:
3079 case R_CRIS_16_GOT_GD:
3080 case R_CRIS_32_GOT_GD:
3081 case R_CRIS_32_GOT_TPREL:
3082 case R_CRIS_16_GOT_TPREL:
3083 case R_CRIS_16_GOT:
3084 case R_CRIS_32_GOT:
3085 case R_CRIS_32_GOTREL:
3086 case R_CRIS_32_PLT_GOTREL:
3087 case R_CRIS_32_PLT_PCREL:
3088 case R_CRIS_16_GOTPLT:
3089 case R_CRIS_32_GOTPLT:
3090 if (dynobj == NULL)
3091 {
3092 elf_hash_table (info)->dynobj = dynobj = abfd;
3093
3094 /* We could handle this if we can get a handle on the
3095 output bfd in elf_cris_adjust_dynamic_symbol. Failing
3096 that, we must insist on dynobj being a specific mach. */
3097 if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
3098 {
3099 (*_bfd_error_handler)
3100 (_("%B, section %A:\n v10/v32 compatible object %s"
3101 " must not contain a PIC relocation"),
3102 abfd, sec);
3103 return FALSE;
3104 }
3105
3106 /* Create the .got section, so we can assume it's always
3107 present whenever there's a dynobj. */
3108 if (!_bfd_elf_create_got_section (dynobj, info))
3109 return FALSE;
3110 }
3111
3112 if (sgot == NULL)
3113 sgot = bfd_get_section_by_name (dynobj, ".got");
3114
3115 if (local_got_refcounts == NULL)
3116 {
3117 bfd_size_type amt;
3118
3119 /* We use index local_got_refcounts[-1] to count all
3120 GOT-relative relocations that do not have explicit
3121 GOT entries. */
3122 amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
3123 amt *= sizeof (bfd_signed_vma);
3124 local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
3125 if (local_got_refcounts == NULL)
3126 return FALSE;
3127
3128 local_got_refcounts++;
3129 elf_local_got_refcounts (abfd) = local_got_refcounts;
3130 }
3131 break;
3132
3133 default:
3134 break;
3135 }
3136
3137 /* Some relocs require a global offset table (but perhaps not a
3138 specific GOT entry). */
3139 switch (r_type)
3140 {
3141 case R_CRIS_16_DTPREL:
3142 case R_CRIS_32_DTPREL:
3143 /* Not requesting .got.rela for an executable: the contents
3144 of the first entry is constant there. For a shared
3145 library, we need .got.rela for the R_CRIS_DTPMOD
3146 relocation at index 3. */
3147 if (!info->shared)
3148 break;
3149 /* Fall through. */
3150
3151 case R_CRIS_32_GD:
3152 case R_CRIS_16_GOT_GD:
3153 case R_CRIS_32_GOT_GD:
3154 case R_CRIS_32_GOT_TPREL:
3155 case R_CRIS_16_GOT_TPREL:
3156 /* Fall through. */
3157
3158 /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
3159 entry only for local symbols. Unfortunately, we don't know
3160 until later on if there's a version script that forces the
3161 symbol local. We must have the .rela.got section in place
3162 before we know if the symbol looks global now, so we need
3163 to treat the reloc just like for R_CRIS_16_GOT and
3164 R_CRIS_32_GOT. */
3165 case R_CRIS_16_GOTPLT:
3166 case R_CRIS_32_GOTPLT:
3167 case R_CRIS_16_GOT:
3168 case R_CRIS_32_GOT:
3169 if (srelgot == NULL
3170 && (h != NULL || info->shared))
3171 {
3172 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3173 if (srelgot == NULL)
3174 {
3175 srelgot = bfd_make_section_with_flags (dynobj,
3176 ".rela.got",
3177 (SEC_ALLOC
3178 | SEC_LOAD
3179 | SEC_HAS_CONTENTS
3180 | SEC_IN_MEMORY
3181 | SEC_LINKER_CREATED
3182 | SEC_READONLY));
3183 if (srelgot == NULL
3184 || !bfd_set_section_alignment (dynobj, srelgot, 2))
3185 return FALSE;
3186 }
3187 }
3188 break;
3189
3190 default:
3191 break;
3192 }
3193
3194 /* Warn and error for invalid input. */
3195 switch (r_type)
3196 {
3197 case R_CRIS_32_TPREL:
3198 case R_CRIS_16_TPREL:
3199 case R_CRIS_32_GD:
3200 if (info->shared)
3201 {
3202 (*_bfd_error_handler)
3203 (_("%B, section %A:\n relocation %s not valid"
3204 " in a shared object;"
3205 " typically an option mixup, recompile with -fPIC"),
3206 abfd,
3207 sec,
3208 cris_elf_howto_table[r_type].name);
3209 /* Don't return FALSE here; we want messages for all of
3210 these and the error behavior is ungraceful
3211 anyway. */
3212 }
3213 default:
3214 break;
3215 }
3216
3217 switch (r_type)
3218 {
3219 case R_CRIS_32_GD:
3220 case R_CRIS_16_GOT_GD:
3221 case R_CRIS_32_GOT_GD:
3222 /* These are requests for tls_index entries, run-time R_CRIS_DTP. */
3223 got_element_size = 8;
3224 r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
3225 break;
3226
3227 case R_CRIS_16_DTPREL:
3228 case R_CRIS_32_DTPREL:
3229 /* These two just request for the constant-index
3230 module-local tls_index-sized GOT entry, which we add
3231 elsewhere. */
3232 break;
3233
3234 case R_CRIS_32_GOT_TPREL:
3235 case R_CRIS_16_GOT_TPREL:
3236 r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
3237
3238 /* Those two relocs also require that a DSO is of type
3239 Initial Exec. Like other targets, we don't reset this
3240 flag even if the relocs are GC:ed away. */
3241 if (info->shared)
3242 info->flags |= DF_STATIC_TLS;
3243 break;
3244
3245 /* Let's list the other assembler-generated TLS-relocs too,
3246 just to show that they're not forgotten. */
3247 case R_CRIS_16_TPREL:
3248 case R_CRIS_32_TPREL:
3249 default:
3250 break;
3251 }
3252
3253 switch (r_type)
3254 {
3255 case R_CRIS_16_GOTPLT:
3256 case R_CRIS_32_GOTPLT:
3257 /* Mark that we need a GOT entry if the PLT entry (and its GOT
3258 entry) is eliminated. We can only do this for a non-local
3259 symbol. */
3260 if (h != NULL)
3261 {
3262 elf_cris_hash_entry (h)->gotplt_refcount++;
3263 goto handle_gotplt_reloc;
3264 }
3265 /* If h is NULL then this is a local symbol, and we must make a
3266 GOT entry for it, so handle it like a GOT reloc. */
3267 /* Fall through. */
3268
3269 case R_CRIS_32_GD:
3270 case R_CRIS_16_GOT_GD:
3271 case R_CRIS_32_GOT_GD:
3272 case R_CRIS_32_GOT_TPREL:
3273 case R_CRIS_16_GOT_TPREL:
3274 case R_CRIS_16_GOT:
3275 case R_CRIS_32_GOT:
3276 /* This symbol requires a global offset table entry. */
3277 if (h != NULL)
3278 {
3279 if (h->got.refcount == 0)
3280 {
3281 /* Make sure this symbol is output as a dynamic symbol. */
3282 if (h->dynindx == -1)
3283 {
3284 if (!bfd_elf_link_record_dynamic_symbol (info, h))
3285 return FALSE;
3286 }
3287 }
3288
3289 /* Update the sum of reloc counts for this symbol. */
3290 h->got.refcount++;
3291
3292 switch (r_type)
3293 {
3294 case R_CRIS_16_GOT:
3295 case R_CRIS_32_GOT:
3296 if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
3297 {
3298 /* Allocate space in the .got section. */
3299 sgot->size += got_element_size;
3300 /* Allocate relocation space. */
3301 srelgot->size += sizeof (Elf32_External_Rela);
3302 }
3303 elf_cris_hash_entry (h)->reg_got_refcount++;
3304 break;
3305
3306 case R_CRIS_32_GD:
3307 case R_CRIS_16_GOT_GD:
3308 case R_CRIS_32_GOT_GD:
3309 if (elf_cris_hash_entry (h)->dtp_refcount == 0)
3310 {
3311 /* Allocate space in the .got section. */
3312 sgot->size += got_element_size;
3313 /* Allocate relocation space. */
3314 srelgot->size += sizeof (Elf32_External_Rela);
3315 }
3316 elf_cris_hash_entry (h)->dtp_refcount++;
3317 break;
3318
3319 case R_CRIS_32_GOT_TPREL:
3320 case R_CRIS_16_GOT_TPREL:
3321 if (elf_cris_hash_entry (h)->tprel_refcount == 0)
3322 {
3323 /* Allocate space in the .got section. */
3324 sgot->size += got_element_size;
3325 /* Allocate relocation space. */
3326 srelgot->size += sizeof (Elf32_External_Rela);
3327 }
3328 elf_cris_hash_entry (h)->tprel_refcount++;
3329 break;
3330
3331 default:
3332 BFD_FAIL ();
3333 break;
3334 }
3335 }
3336 else
3337 {
3338 /* This is a global offset table entry for a local symbol. */
3339 if (local_got_refcounts[r_symndx_lgot] == 0)
3340 {
3341 sgot->size += got_element_size;
3342 if (info->shared)
3343 {
3344 /* If we are generating a shared object, we need
3345 to output a R_CRIS_RELATIVE reloc so that the
3346 dynamic linker can adjust this GOT entry.
3347 Similarly for non-regular got entries. */
3348 srelgot->size += sizeof (Elf32_External_Rela);
3349 }
3350 }
3351 /* Update the reloc-specific count. */
3352 local_got_refcounts[r_symndx_lgot]++;
3353
3354 /* This one is the sum of all the others. */
3355 local_got_refcounts[r_symndx]++;
3356 }
3357 break;
3358
3359 case R_CRIS_16_DTPREL:
3360 case R_CRIS_32_DTPREL:
3361 case R_CRIS_32_GOTREL:
3362 /* This reference requires a global offset table.
3363 FIXME: The actual refcount isn't used currently; the .got
3364 section can't be removed if there were any references in the
3365 input. */
3366 local_got_refcounts[-1]++;
3367 break;
3368
3369 handle_gotplt_reloc:
3370
3371 case R_CRIS_32_PLT_GOTREL:
3372 /* This reference requires a global offset table. */
3373 local_got_refcounts[-1]++;
3374 /* Fall through. */
3375
3376 case R_CRIS_32_PLT_PCREL:
3377 /* This symbol requires a procedure linkage table entry. We
3378 actually build the entry in adjust_dynamic_symbol,
3379 because this might be a case of linking PIC code which is
3380 never referenced by a dynamic object, in which case we
3381 don't need to generate a procedure linkage table entry
3382 after all. */
3383
3384 /* Beware: if we'd check for visibility of the symbol here
3385 (and not marking the need for a PLT when non-visible), we'd
3386 get into trouble with keeping handling consistent with
3387 regards to relocs found before definition and GOTPLT
3388 handling. Eliminable PLT entries will be dealt with later
3389 anyway. */
3390 if (h == NULL)
3391 continue;
3392
3393 h->needs_plt = 1;
3394 h->plt.refcount++;
3395 break;
3396
3397 case R_CRIS_8:
3398 case R_CRIS_16:
3399 case R_CRIS_32:
3400 /* Let's help debug shared library creation. Any of these
3401 relocs can be used in shared libs, but pages containing them
3402 cannot be shared. Don't warn for sections we don't care
3403 about, such as debug sections or non-constant sections. We
3404 can't help tables of (global) function pointers, for example,
3405 though they must be emitted in a data section to avoid having
3406 impure text sections. */
3407 if (info->shared
3408 && (sec->flags & SEC_ALLOC) != 0
3409 && (sec->flags & SEC_READONLY) != 0)
3410 {
3411 /* FIXME: How do we make this optionally a warning only? */
3412 (*_bfd_error_handler)
3413 (_("%B, section %A:\n relocation %s should not"
3414 " be used in a shared object; recompile with -fPIC"),
3415 abfd,
3416 sec,
3417 cris_elf_howto_table[r_type].name);
3418 }
3419
3420 /* Fall through. */
3421
3422 case R_CRIS_8_PCREL:
3423 case R_CRIS_16_PCREL:
3424 case R_CRIS_32_PCREL:
3425 if (h != NULL)
3426 {
3427 h->non_got_ref = 1;
3428
3429 /* Make sure a plt entry is created for this symbol if it
3430 turns out to be a function defined by a dynamic object. */
3431 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3432 h->plt.refcount++;
3433 }
3434
3435 /* If we are creating a shared library and this is not a local
3436 symbol, we need to copy the reloc into the shared library.
3437 However when linking with -Bsymbolic and this is a global
3438 symbol which is defined in an object we are including in the
3439 link (i.e., DEF_REGULAR is set), then we can resolve the
3440 reloc directly. At this point we have not seen all the input
3441 files, so it is possible that DEF_REGULAR is not set now but
3442 will be set later (it is never cleared). In case of a weak
3443 definition, DEF_REGULAR may be cleared later by a strong
3444 definition in a shared library. We account for that
3445 possibility below by storing information in the relocs_copied
3446 field of the hash table entry. A similar situation occurs
3447 when creating shared libraries and symbol visibility changes
3448 render the symbol local. */
3449
3450 /* No need to do anything if we're not creating a shared object. */
3451 if (! info->shared)
3452 break;
3453
3454 /* We don't need to handle relocs into sections not going into
3455 the "real" output. */
3456 if ((sec->flags & SEC_ALLOC) == 0)
3457 break;
3458
3459 /* We can only eliminate PC-relative relocs. */
3460 if (r_type == R_CRIS_8_PCREL
3461 || r_type == R_CRIS_16_PCREL
3462 || r_type == R_CRIS_32_PCREL)
3463 {
3464 /* If the symbol is local, then we can eliminate the reloc. */
3465 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3466 break;
3467
3468 /* If this is with -Bsymbolic and the symbol isn't weak, and
3469 is defined by an ordinary object (the ones we include in
3470 this shared library) then we can also eliminate the
3471 reloc. See comment above for more eliminable cases which
3472 we can't identify at this time. */
3473 if (info->symbolic
3474 && h->root.type != bfd_link_hash_defweak
3475 && h->def_regular)
3476 break;
3477
3478 if ((sec->flags & SEC_READONLY) != 0)
3479 {
3480 /* FIXME: How do we make this optionally a warning only? */
3481 (*_bfd_error_handler)
3482 (_("%B, section %A:\n relocation %s should not be used"
3483 " in a shared object; recompile with -fPIC"),
3484 abfd,
3485 sec,
3486 cris_elf_howto_table[r_type].name);
3487 }
3488 }
3489
3490 /* We may need to create a reloc section in the dynobj and made room
3491 for this reloc. */
3492 if (sreloc == NULL)
3493 {
3494 sreloc = _bfd_elf_make_dynamic_reloc_section
3495 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3496
3497 if (sreloc == NULL)
3498 return FALSE;
3499
3500 if (sec->flags & SEC_READONLY)
3501 info->flags |= DF_TEXTREL;
3502 }
3503
3504 sreloc->size += sizeof (Elf32_External_Rela);
3505
3506 /* If we are linking with -Bsymbolic, we count the number of PC
3507 relative relocations we have entered for this symbol, so that
3508 we can discard them again if the symbol is later defined by a
3509 regular object. We know that h is really a pointer to an
3510 elf_cris_link_hash_entry. */
3511 if ((r_type == R_CRIS_8_PCREL
3512 || r_type == R_CRIS_16_PCREL
3513 || r_type == R_CRIS_32_PCREL)
3514 && info->symbolic)
3515 {
3516 struct elf_cris_link_hash_entry *eh;
3517 struct elf_cris_pcrel_relocs_copied *p;
3518
3519 eh = elf_cris_hash_entry (h);
3520
3521 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
3522 if (p->section == sreloc)
3523 break;
3524
3525 if (p == NULL)
3526 {
3527 p = ((struct elf_cris_pcrel_relocs_copied *)
3528 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
3529 if (p == NULL)
3530 return FALSE;
3531 p->next = eh->pcrel_relocs_copied;
3532 eh->pcrel_relocs_copied = p;
3533 p->section = sreloc;
3534 p->count = 0;
3535 }
3536
3537 ++p->count;
3538 }
3539 break;
3540
3541 /* This relocation describes the C++ object vtable hierarchy.
3542 Reconstruct it for later use during GC. */
3543 case R_CRIS_GNU_VTINHERIT:
3544 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3545 return FALSE;
3546 break;
3547
3548 /* This relocation describes which C++ vtable entries are actually
3549 used. Record for later use during GC. */
3550 case R_CRIS_GNU_VTENTRY:
3551 BFD_ASSERT (h != NULL);
3552 if (h != NULL
3553 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3554 return FALSE;
3555 break;
3556
3557 case R_CRIS_16_TPREL:
3558 case R_CRIS_32_TPREL:
3559 /* Already warned above, when necessary. */
3560 break;
3561
3562 default:
3563 /* Other relocs do not appear here. */
3564 bfd_set_error (bfd_error_bad_value);
3565 return FALSE;
3566 }
3567 }
3568
3569 return TRUE;
3570 }
3571
3572 /* Set the sizes of the dynamic sections. */
3573
3574 static bfd_boolean
3575 elf_cris_size_dynamic_sections (output_bfd, info)
3576 bfd *output_bfd ATTRIBUTE_UNUSED;
3577 struct bfd_link_info *info;
3578 {
3579 bfd *dynobj;
3580 asection *s;
3581 bfd_boolean plt;
3582 bfd_boolean relocs;
3583
3584 dynobj = elf_hash_table (info)->dynobj;
3585 BFD_ASSERT (dynobj != NULL);
3586
3587 if (elf_hash_table (info)->dynamic_sections_created)
3588 {
3589 /* Set the contents of the .interp section to the interpreter. */
3590 if (info->executable)
3591 {
3592 s = bfd_get_section_by_name (dynobj, ".interp");
3593 BFD_ASSERT (s != NULL);
3594 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3595 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3596 }
3597 }
3598 else
3599 {
3600 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */
3601 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
3602 elf_cris_adjust_gotplt_to_got,
3603 (PTR) info);
3604
3605 /* We may have created entries in the .rela.got section.
3606 However, if we are not creating the dynamic sections, we will
3607 not actually use these entries. Reset the size of .rela.got,
3608 which will cause it to get stripped from the output file
3609 below. */
3610 s = bfd_get_section_by_name (dynobj, ".rela.got");
3611 if (s != NULL)
3612 s->size = 0;
3613 }
3614
3615 /* If this is a -Bsymbolic shared link, then we need to discard all PC
3616 relative relocs against symbols defined in a regular object. We
3617 allocated space for them in the check_relocs routine, but we will not
3618 fill them in in the relocate_section routine. We also discard space
3619 for relocs that have become for local symbols due to symbol
3620 visibility changes. For programs, we discard space for relocs for
3621 symbols not referenced by any dynamic object. */
3622 if (info->shared)
3623 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
3624 elf_cris_discard_excess_dso_dynamics,
3625 (PTR) info);
3626 else
3627 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
3628 elf_cris_discard_excess_program_dynamics,
3629 (PTR) info);
3630
3631 /* The check_relocs and adjust_dynamic_symbol entry points have
3632 determined the sizes of the various dynamic sections. Allocate
3633 memory for them. */
3634 plt = FALSE;
3635 relocs = FALSE;
3636 for (s = dynobj->sections; s != NULL; s = s->next)
3637 {
3638 const char *name;
3639
3640 if ((s->flags & SEC_LINKER_CREATED) == 0)
3641 continue;
3642
3643 /* It's OK to base decisions on the section name, because none
3644 of the dynobj section names depend upon the input files. */
3645 name = bfd_get_section_name (dynobj, s);
3646
3647 if (strcmp (name, ".plt") == 0)
3648 {
3649 /* Remember whether there is a PLT. */
3650 plt = s->size != 0;
3651 }
3652 else if (strcmp (name, ".got.plt") == 0)
3653 {
3654 /* The .got.plt contains the .got header as well as the
3655 actual .got.plt contents. The .got header may contain a
3656 R_CRIS_DTPMOD entry at index 3. */
3657 s->size += elf_cris_hash_table (info)->dtpmod_refcount != 0
3658 ? 8 : 0;
3659 }
3660 else if (CONST_STRNEQ (name, ".rela"))
3661 {
3662 if (strcmp (name, ".rela.got") == 0
3663 && elf_cris_hash_table (info)->dtpmod_refcount != 0
3664 && info->shared)
3665 s->size += sizeof (Elf32_External_Rela);
3666
3667 if (s->size != 0)
3668 {
3669 /* Remember whether there are any reloc sections other
3670 than .rela.plt. */
3671 if (strcmp (name, ".rela.plt") != 0)
3672 relocs = TRUE;
3673
3674 /* We use the reloc_count field as a counter if we need
3675 to copy relocs into the output file. */
3676 s->reloc_count = 0;
3677 }
3678 }
3679 else if (! CONST_STRNEQ (name, ".got")
3680 && strcmp (name, ".dynbss") != 0)
3681 {
3682 /* It's not one of our sections, so don't allocate space. */
3683 continue;
3684 }
3685
3686 if (s->size == 0)
3687 {
3688 /* If we don't need this section, strip it from the
3689 output file. This is mostly to handle .rela.bss and
3690 .rela.plt. We must create both sections in
3691 create_dynamic_sections, because they must be created
3692 before the linker maps input sections to output
3693 sections. The linker does that before
3694 adjust_dynamic_symbol is called, and it is that
3695 function which decides whether anything needs to go
3696 into these sections. */
3697 s->flags |= SEC_EXCLUDE;
3698 continue;
3699 }
3700
3701 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3702 continue;
3703
3704 /* Allocate memory for the section contents. We use bfd_zalloc here
3705 in case unused entries are not reclaimed before the section's
3706 contents are written out. This should not happen, but this way
3707 if it does, we will not write out garbage. For reloc sections,
3708 this will make entries have the type R_CRIS_NONE. */
3709 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3710 if (s->contents == NULL)
3711 return FALSE;
3712 }
3713
3714 if (elf_hash_table (info)->dynamic_sections_created)
3715 {
3716 /* Add some entries to the .dynamic section. We fill in the
3717 values later, in elf_cris_finish_dynamic_sections, but we
3718 must add the entries now so that we get the correct size for
3719 the .dynamic section. The DT_DEBUG entry is filled in by the
3720 dynamic linker and used by the debugger. */
3721 #define add_dynamic_entry(TAG, VAL) \
3722 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3723
3724 if (!info->shared)
3725 {
3726 if (!add_dynamic_entry (DT_DEBUG, 0))
3727 return FALSE;
3728 }
3729
3730 if (plt)
3731 {
3732 if (!add_dynamic_entry (DT_PLTGOT, 0)
3733 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3734 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3735 || !add_dynamic_entry (DT_JMPREL, 0))
3736 return FALSE;
3737 }
3738
3739 if (relocs)
3740 {
3741 if (!add_dynamic_entry (DT_RELA, 0)
3742 || !add_dynamic_entry (DT_RELASZ, 0)
3743 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3744 return FALSE;
3745 }
3746
3747 if ((info->flags & DF_TEXTREL) != 0)
3748 {
3749 if (!add_dynamic_entry (DT_TEXTREL, 0))
3750 return FALSE;
3751 info->flags |= DF_TEXTREL;
3752 }
3753 }
3754 #undef add_dynamic_entry
3755
3756 return TRUE;
3757 }
3758
3759 /* This function is called via elf_cris_link_hash_traverse if we are
3760 creating a shared object. In the -Bsymbolic case, it discards the
3761 space allocated to copy PC relative relocs against symbols which
3762 are defined in regular objects. For the normal non-symbolic case,
3763 we also discard space for relocs that have become local due to
3764 symbol visibility changes. We allocated space for them in the
3765 check_relocs routine, but we won't fill them in in the
3766 relocate_section routine. */
3767
3768 static bfd_boolean
3769 elf_cris_discard_excess_dso_dynamics (h, inf)
3770 struct elf_cris_link_hash_entry *h;
3771 PTR inf;
3772 {
3773 struct elf_cris_pcrel_relocs_copied *s;
3774 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3775
3776 if (h->root.root.type == bfd_link_hash_warning)
3777 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3778
3779 /* If a symbol has been forced local or we have found a regular
3780 definition for the symbolic link case, then we won't be needing
3781 any relocs. */
3782 if (h->root.def_regular
3783 && (h->root.forced_local
3784 || info->symbolic))
3785 {
3786 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3787 s->section->size -= s->count * sizeof (Elf32_External_Rela);
3788 }
3789
3790 return TRUE;
3791 }
3792
3793 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3794 creating a shared object. We discard space for relocs for symbols put
3795 in the .got, but which we found we do not have to resolve at run-time. */
3796
3797 static bfd_boolean
3798 elf_cris_discard_excess_program_dynamics (h, inf)
3799 struct elf_cris_link_hash_entry *h;
3800 PTR inf;
3801 {
3802 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3803
3804 if (h->root.root.type == bfd_link_hash_warning)
3805 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3806
3807 /* If we're not creating a shared library and have a symbol which is
3808 referred to by .got references, but the symbol is defined locally,
3809 (or rather, not defined by a DSO) then lose the reloc for the .got
3810 (don't allocate room for it). Likewise for relocs for something
3811 for which we create a PLT. */
3812 if (!h->root.def_dynamic
3813 || h->root.plt.refcount > 0)
3814 {
3815 if (h->reg_got_refcount > 0
3816 /* The size of this section is only valid and in sync with the
3817 various reference counts if we do dynamic; don't decrement it
3818 otherwise. */
3819 && elf_hash_table (info)->dynamic_sections_created)
3820 {
3821 bfd *dynobj = elf_hash_table (info)->dynobj;
3822 asection *srelgot;
3823
3824 BFD_ASSERT (dynobj != NULL);
3825
3826 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3827
3828 BFD_ASSERT (srelgot != NULL);
3829
3830 srelgot->size -= sizeof (Elf32_External_Rela);
3831 }
3832
3833 /* If the locally-defined symbol isn't used by a DSO, then we don't
3834 have to export it as a dynamic symbol. This was already done for
3835 functions; doing this for all symbols would presumably not
3836 introduce new problems. Of course we don't do this if we're
3837 exporting all dynamic symbols. */
3838 if (! info->export_dynamic
3839 && h->root.dynindx != -1
3840 && !h->root.def_dynamic
3841 && !h->root.ref_dynamic)
3842 {
3843 h->root.dynindx = -1;
3844 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3845 h->root.dynstr_index);
3846 }
3847 }
3848
3849 return TRUE;
3850 }
3851
3852 /* Reject a file depending on presence and expectation of prefixed
3853 underscores on symbols. */
3854
3855 static bfd_boolean
3856 cris_elf_object_p (abfd)
3857 bfd *abfd;
3858 {
3859 if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
3860 return FALSE;
3861
3862 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
3863 return (bfd_get_symbol_leading_char (abfd) == '_');
3864 else
3865 return (bfd_get_symbol_leading_char (abfd) == 0);
3866 }
3867
3868 /* Mark presence or absence of leading underscore. Set machine type
3869 flags from mach type. */
3870
3871 static void
3872 cris_elf_final_write_processing (abfd, linker)
3873 bfd *abfd;
3874 bfd_boolean linker ATTRIBUTE_UNUSED;
3875 {
3876 unsigned long e_flags = elf_elfheader (abfd)->e_flags;
3877
3878 e_flags &= ~EF_CRIS_UNDERSCORE;
3879 if (bfd_get_symbol_leading_char (abfd) == '_')
3880 e_flags |= EF_CRIS_UNDERSCORE;
3881
3882 switch (bfd_get_mach (abfd))
3883 {
3884 case bfd_mach_cris_v0_v10:
3885 e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
3886 break;
3887
3888 case bfd_mach_cris_v10_v32:
3889 e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
3890 break;
3891
3892 case bfd_mach_cris_v32:
3893 e_flags |= EF_CRIS_VARIANT_V32;
3894 break;
3895
3896 default:
3897 _bfd_abort (__FILE__, __LINE__,
3898 _("Unexpected machine number"));
3899 }
3900
3901 elf_elfheader (abfd)->e_flags = e_flags;
3902 }
3903
3904 /* Set the mach type from e_flags value. */
3905
3906 static bfd_boolean
3907 cris_elf_set_mach_from_flags (abfd, flags)
3908 bfd *abfd;
3909 unsigned long flags;
3910 {
3911 switch (flags & EF_CRIS_VARIANT_MASK)
3912 {
3913 case EF_CRIS_VARIANT_ANY_V0_V10:
3914 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
3915 break;
3916
3917 case EF_CRIS_VARIANT_V32:
3918 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
3919 break;
3920
3921 case EF_CRIS_VARIANT_COMMON_V10_V32:
3922 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
3923 break;
3924
3925 default:
3926 /* Since we don't recognize them, we obviously can't support them
3927 with this code; we'd have to require that all future handling
3928 would be optional. */
3929 bfd_set_error (bfd_error_wrong_format);
3930 return FALSE;
3931 }
3932
3933 return TRUE;
3934 }
3935
3936 /* Display the flags field. */
3937
3938 static bfd_boolean
3939 cris_elf_print_private_bfd_data (abfd, ptr)
3940 bfd *abfd;
3941 PTR ptr;
3942 {
3943 FILE *file = (FILE *) ptr;
3944
3945 BFD_ASSERT (abfd != NULL && ptr != NULL);
3946
3947 _bfd_elf_print_private_bfd_data (abfd, ptr);
3948
3949 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3950
3951 if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
3952 fprintf (file, _(" [symbols have a _ prefix]"));
3953 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3954 == EF_CRIS_VARIANT_COMMON_V10_V32)
3955 fprintf (file, _(" [v10 and v32]"));
3956 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3957 == EF_CRIS_VARIANT_V32)
3958 fprintf (file, _(" [v32]"));
3959
3960 fputc ('\n', file);
3961 return TRUE;
3962 }
3963
3964 /* Don't mix files with and without a leading underscore. */
3965
3966 static bfd_boolean
3967 cris_elf_merge_private_bfd_data (ibfd, obfd)
3968 bfd *ibfd;
3969 bfd *obfd;
3970 {
3971 int imach, omach;
3972
3973 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3974 return FALSE;
3975
3976 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3977 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3978 return TRUE;
3979
3980 imach = bfd_get_mach (ibfd);
3981
3982 if (! elf_flags_init (obfd))
3983 {
3984 /* This happens when ld starts out with a 'blank' output file. */
3985 elf_flags_init (obfd) = TRUE;
3986
3987 /* We ignore the linker-set mach, and instead set it according to
3988 the first input file. This would also happen if we could
3989 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
3990 This allows us to keep the same linker config across
3991 cris(v0..v10) and crisv32. The drawback is that we can't force
3992 the output type, which might be a sane thing to do for a
3993 v10+v32 compatibility object. */
3994 if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3995 return FALSE;
3996 }
3997
3998 if (bfd_get_symbol_leading_char (ibfd)
3999 != bfd_get_symbol_leading_char (obfd))
4000 {
4001 (*_bfd_error_handler)
4002 (bfd_get_symbol_leading_char (ibfd) == '_'
4003 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
4004 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
4005 ibfd);
4006 bfd_set_error (bfd_error_bad_value);
4007 return FALSE;
4008 }
4009
4010 omach = bfd_get_mach (obfd);
4011
4012 if (imach != omach)
4013 {
4014 /* We can get an incompatible combination only if either is
4015 bfd_mach_cris_v32, and the other one isn't compatible. */
4016 if ((imach == bfd_mach_cris_v32
4017 && omach != bfd_mach_cris_v10_v32)
4018 || (omach == bfd_mach_cris_v32
4019 && imach != bfd_mach_cris_v10_v32))
4020 {
4021 (*_bfd_error_handler)
4022 ((imach == bfd_mach_cris_v32)
4023 ? _("%B contains CRIS v32 code, incompatible"
4024 " with previous objects")
4025 : _("%B contains non-CRIS-v32 code, incompatible"
4026 " with previous objects"),
4027 ibfd);
4028 bfd_set_error (bfd_error_bad_value);
4029 return FALSE;
4030 }
4031
4032 /* We don't have to check the case where the input is compatible
4033 with v10 and v32, because the output is already known to be set
4034 to the other (compatible) mach. */
4035 if (omach == bfd_mach_cris_v10_v32
4036 && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4037 return FALSE;
4038 }
4039
4040 return TRUE;
4041 }
4042
4043 /* Do side-effects of e_flags copying to obfd. */
4044
4045 static bfd_boolean
4046 cris_elf_copy_private_bfd_data (ibfd, obfd)
4047 bfd *ibfd;
4048 bfd *obfd;
4049 {
4050 /* Call the base function. */
4051 if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
4052 return FALSE;
4053
4054 /* If output is big-endian for some obscure reason, stop here. */
4055 if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
4056 return FALSE;
4057
4058 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4059 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4060 return TRUE;
4061
4062 /* Do what we really came here for. */
4063 return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
4064 }
4065
4066 static enum elf_reloc_type_class
4067 elf_cris_reloc_type_class (rela)
4068 const Elf_Internal_Rela *rela;
4069 {
4070 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info);
4071 switch (r_type)
4072 {
4073 case R_CRIS_RELATIVE:
4074 return reloc_class_relative;
4075 case R_CRIS_JUMP_SLOT:
4076 return reloc_class_plt;
4077 case R_CRIS_COPY:
4078 return reloc_class_copy;
4079 default:
4080 return reloc_class_normal;
4081 }
4082 }
4083
4084 /* The elf_backend_got_elt_size worker. For one symbol, we can have up to
4085 two GOT entries from three types with two different sizes. We handle
4086 it as a single entry, so we can use the regular offset-calculation
4087 machinery. */
4088
4089 static bfd_vma
4090 elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED,
4091 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4092 struct elf_link_hash_entry *hr,
4093 bfd *ibfd,
4094 unsigned long symndx)
4095 {
4096 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr;
4097 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4098 bfd_vma eltsiz = 0;
4099
4100 /* We may have one regular GOT entry or up to two TLS GOT
4101 entries. */
4102 if (h == NULL)
4103 {
4104 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd);
4105
4106 BFD_ASSERT (local_got_refcounts != NULL);
4107
4108 if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0)
4109 {
4110 /* We can't have a variable referred to both as a regular
4111 variable and through TLS relocs. */
4112 BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0
4113 && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0);
4114 return 4;
4115 }
4116
4117 if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0)
4118 eltsiz += 8;
4119
4120 if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0)
4121 eltsiz += 4;
4122 }
4123 else
4124 {
4125 struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h);
4126 if (hh->reg_got_refcount > 0)
4127 {
4128 /* The actual error-on-input is emitted elsewhere. */
4129 BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0);
4130 return 4;
4131 }
4132
4133 if (hh->dtp_refcount > 0)
4134 eltsiz += 8;
4135
4136 if (hh->tprel_refcount > 0)
4137 eltsiz += 4;
4138 }
4139
4140 return eltsiz;
4141 }
4142 \f
4143 #define ELF_ARCH bfd_arch_cris
4144 #define ELF_MACHINE_CODE EM_CRIS
4145 #define ELF_MAXPAGESIZE 0x2000
4146
4147 #define TARGET_LITTLE_SYM bfd_elf32_cris_vec
4148 #define TARGET_LITTLE_NAME "elf32-cris"
4149 #define elf_symbol_leading_char 0
4150
4151 #define elf_info_to_howto_rel NULL
4152 #define elf_info_to_howto cris_info_to_howto_rela
4153 #define elf_backend_relocate_section cris_elf_relocate_section
4154 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
4155 #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook
4156 #define elf_backend_check_relocs cris_elf_check_relocs
4157 #define elf_backend_grok_prstatus cris_elf_grok_prstatus
4158 #define elf_backend_grok_psinfo cris_elf_grok_psinfo
4159
4160 #define elf_backend_can_gc_sections 1
4161 #define elf_backend_can_refcount 1
4162
4163 #define elf_backend_object_p cris_elf_object_p
4164 #define elf_backend_final_write_processing \
4165 cris_elf_final_write_processing
4166 #define bfd_elf32_bfd_print_private_bfd_data \
4167 cris_elf_print_private_bfd_data
4168 #define bfd_elf32_bfd_merge_private_bfd_data \
4169 cris_elf_merge_private_bfd_data
4170 #define bfd_elf32_bfd_copy_private_bfd_data \
4171 cris_elf_copy_private_bfd_data
4172
4173 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
4174 #define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup
4175
4176 #define bfd_elf32_bfd_link_hash_table_create \
4177 elf_cris_link_hash_table_create
4178 #define elf_backend_adjust_dynamic_symbol \
4179 elf_cris_adjust_dynamic_symbol
4180 #define elf_backend_size_dynamic_sections \
4181 elf_cris_size_dynamic_sections
4182 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4183 #define elf_backend_finish_dynamic_symbol \
4184 elf_cris_finish_dynamic_symbol
4185 #define elf_backend_finish_dynamic_sections \
4186 elf_cris_finish_dynamic_sections
4187 #define elf_backend_create_dynamic_sections \
4188 _bfd_elf_create_dynamic_sections
4189 #define bfd_elf32_bfd_final_link \
4190 bfd_elf_gc_common_final_link
4191 #define elf_backend_hide_symbol elf_cris_hide_symbol
4192 #define elf_backend_reloc_type_class elf_cris_reloc_type_class
4193
4194 #define elf_backend_want_got_plt 1
4195 #define elf_backend_plt_readonly 1
4196 #define elf_backend_want_plt_sym 0
4197 #define elf_backend_got_header_size 12
4198 #define elf_backend_got_elt_size elf_cris_got_elt_size
4199
4200 /* Later, we my want to optimize RELA entries into REL entries for dynamic
4201 linking and libraries (if it's a win of any significance). Until then,
4202 take the easy route. */
4203 #define elf_backend_may_use_rel_p 0
4204 #define elf_backend_may_use_rela_p 1
4205 #define elf_backend_rela_normal 1
4206
4207 #include "elf32-target.h"
4208
4209 #undef TARGET_LITTLE_SYM
4210 #undef TARGET_LITTLE_NAME
4211 #undef elf_symbol_leading_char
4212
4213 #define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec
4214 #define TARGET_LITTLE_NAME "elf32-us-cris"
4215 #define elf_symbol_leading_char '_'
4216 #undef elf32_bed
4217 #define elf32_bed elf32_us_cris_bed
4218
4219 #include "elf32-target.h"
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